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Observer perceptions of the justifiability of the actions of nations in conflict: The relative importance of conveying national vulnerability versus strength

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Because the underdog in a conflict typically gains the support of observers, nations will often adopt a narrative that persuades both their domestic following and international allies that they are the true victim in the conflict. Three survey studies were conducted to assess the perceptions of citizens of a third-party observer nation (Canada) in relation to two nations in conflict that differ in their historical persecution, namely the U.S. and Israel. Perceptions of the vulnerability of their safety and survival, and their strength to protect themselves against their opponents were hypothesized to mediate differences in the perceived justification for each nation’s conflict actions. Study 1 (N = 91) supported this mediational model, with the U.S. seen as less vulnerable and more powerful than Israel, and perceptions of vulnerability accounting for differences in the justifiability of their respective conflict actions. Study 2 (N = 315) further demonstrated a moderating effect of Canadians’ shared identity with the nations in conflict; only at lower levels of a shared identity was Israel perceived to be more vulnerable and the mediated relation with the perceived justifiability of its conflict actions retained. Study 3 was conducted 10 years later (2018), administering measures to an independent sample of Canadian participants (N = 300). Canadians were found to be significantly less likely to share a common identity with Americans than previously; once again, the mediating role of the perceived vulnerability of the nations in conflict and the justifiability of their actions was conditional on shared identification. The findings contribute to understanding influences on the credibility of victim claims by nations in conflict, as well as implications for how their actions are construed by citizens of a third-party observer nation.
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RESEARCH ARTICLE
Observer perceptions of the justifiability of
the actions of nations in conflict: The relative
importance of conveying national
vulnerability versus strength
Kimberly MathesonID
1,2
*, Nyla Branscombe
3
, Yechiel Klar
4
, Hymie Anisman
1,2
1Department of Neuroscience, Carleton University, Ottawa, Ontario, Canada, 2Institute of Mental Health
Research, University of Ottawa, Ottawa, Ontario, Canada, 3Department of Psychology, University of
Kansas, Lawrence, Kansas, United States of America, 4Department of Psychology, University of Tel Aviv,
Tel Aviv, Israel
*kim.matheson@carleton.ca
Abstract
Because the underdog in a conflict typically gains the support of observers, nations will
often adopt a narrative that persuades both their domestic following and international allies
that they are the true victim in the conflict. Three survey studies were conducted to assess
the perceptions of citizens of a third-party observer nation (Canada) in relation to two nations
in conflict that differ in their historical persecution, namely the U.S. and Israel. Perceptions
of the vulnerability of their safety and survival, and their strength to protect themselves
against their opponents were hypothesized to mediate differences in the perceived justifica-
tion for each nation’s conflict actions. Study 1 (N= 91) supported this mediational model,
with the U.S. seen as less vulnerable and more powerful than Israel, and perceptions of vul-
nerability accounting for differences in the justifiability of their respective conflict actions.
Study 2 (N= 315) further demonstrated a moderating effect of Canadians’ shared identity
with the nations in conflict; only at lower levels of a shared identity was Israel perceived to
be more vulnerable and the mediated relation with the perceived justifiability of its conflict
actions retained. Study 3 was conducted 10 years later (2018), administering measures to
an independent sample of Canadian participants (N= 300). Canadians were found to be sig-
nificantly less likely to share a common identity with Americans than previously; once again,
the mediating role of the perceived vulnerability of the nations in conflict and the justifiability
of their actions was conditional on shared identification. The findings contribute to under-
standing influences on the credibility of victim claims by nations in conflict, as well as impli-
cations for how their actions are construed by citizens of a third-party observer nation.
Introduction
In Western cultures, there is a predilection to support the underdog in conflict situations [1
3]. It has been suggested that this response emanates from principles of fairness and social
PLOS ONE | https://doi.org/10.1371/journal.pone.0220303 July 29, 2019 1 / 20
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OPEN ACCESS
Citation: Matheson K, Branscombe N, Klar Y,
Anisman H (2019) Observer perceptions of the
justifiability of the actions of nations in conflict: The
relative importance of conveying national
vulnerability versus strength. PLoS ONE 14(7):
e0220303. https://doi.org/10.1371/journal.
pone.0220303
Editor: Geoffrey Wetherell, Valparaiso University,
UNITED STATES
Received: March 7, 2019
Accepted: July 13, 2019
Published: July 29, 2019
Copyright: ©2019 Matheson et al. This is an open
access article distributed under the terms of the
Creative Commons Attribution License, which
permits unrestricted use, distribution, and
reproduction in any medium, provided the original
author and source are credited.
Data Availability Statement: All relevant data are
within the paper and its Supporting Information
files.
Funding: KM was funded by Social Sciences and
Humanities Research Council of Canada (Grant
number 435-2018-1220), www.sshrc-crsh.gc.ca.
The funders had no role in study design, data
collection and analysis, decision to publish, or
preparation of the manuscript.
justice [4]. Alternatively, individuals might otherwise be motivated to bask in the glory of a
powerful ally [5], or to maintain a stable status hierarchy [6]. Yet, it is not always clear who
constitutes the underdog, as this varies with context, as do perceptions of the legitimacy of the
actions taken by the underdog. On the world stage, political leaders play on these factors in the
narratives that they spin regarding their involvement in international conflicts [7]. By doing
so, leaders attempt not only to solicit greater domestic support, but to garner approval on the
world stage, together with moral, if not tangible, support [8]. In this regard, it might be that
different strategies are effective depending on the historical underdog (vs. top dog) status of a
nation in conflict.
National leaders have, indeed, opted for different strategies to render their conflict actions
morally justifiable. For example, President George W. Bush sought to elicit domestic and inter-
national support by depicting America as engaging in a ‘war on terror’ [9] and fighting an ‘axis
of evil’ [10] in reference to Iraq, Iran, and North Korea. Such a strategy aimed at rendering
actions justifiable by raising fears about the magnitude of the threat and violence that could be
faced. Over a decade later, amidst his repeated complaints about America being ‘ripped off’ by
its allies (and competitors) around the world [11], President Donald J. Trump’s ‘America-
First’ campaign conveyed a confident anticipation of triumph in the face of adversities. Both
discourses highlight a claim to the collective victimization of the United States, despite its
long-standing international status as a ‘superpower’. By contrast, a nation such as Israel, whose
foundation was built on addressing centuries of Jewish persecution [12], attempted to gain
international support by presenting its conflict actions as necessary to protect shared values, as
stated by Israeli Prime Minister Netanyahu, “We stand together to defend democracy” [13
15]. In effect, nations in conflict, whether they are the alleged underdog or top dog, might seek
support in the context of their collective victimization at the same time as asserting shared
goals and a capacity to contribute to the positive status of other ‘like-minded’ nations. The goal
of the present investigation was to assess the perceptions of citizens from a third-party
observer nation concerning the vulnerability versus strength of nations in conflict, and the
implications of these perceptions for observers’ beliefs about the legitimacy of their conflict
actions. Further assessed was the extent to which these relations were moderated by whether
the perceived values of the nation in conflict were seen to be shared with those of the observer
nation. Changing times certainly may alter these perceptions, and thus we evaluated observer
perspectives at distinct historical time points 10 years apart.
Historical victimization and national vulnerability
There is a tendency to support the most vulnerable in conflict situations [1,3]. The sympathy
associated with the continued suffering or fear experienced by a vulnerable group promotes
perceptions that protective actions taken by the group are morally justified [1,7,16]. In effect,
status as an undeserving victim of illegitimate harm confers moral credentials, and a right to
expect symbolic or material reparations [1,17]. While long-standing historical persecution of a
group is likely to elicit perceptions of vulnerability [18], more powerful groups also might pres-
ent themselves as the real victims in a conflict in order to establish moral entitlement and
moral outrage [8,19]. In so doing, there is solidification of the ingroup’s identity in recognition
of a shared fate and the need for solidarity to ward off threats. In addition, observer groups,
including the international community, are more likely to lend support to the perceived victim
of conflict [1].
Even as nations in conflict vie for being regarded as the truly victimized, the credibility of
such a claim can vary. Although differential perceptions might exist concerning the underdog
and top dog opponents in a specific conflict, there is little research to elucidate when a top
Perceived justifiability of international conflict actions
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Competing interests: The authors have declared
that no competing interests exist.
dog’s claim to victimization is perceived as legitimate. On the one hand, it has been suggested
that national strength and power to contend with a threat do not undermine the capacity to
establish one’s own group as a victim [8]. On the other hand, a long history of persecution and
historical victimization (or lack thereof) might well contribute to the viability of a victim narra-
tive. For example, in contrast to the U.S., which is typically regarded as an economic and mili-
tary superpower, Israel’s national identity is often perceived as being founded in historical
victimization, represented through persecution of Jews through the centuries, including the
most recent genocide perpetrated in the Holocaust [1,12,20]. Thus, while both nations might
be regarded as top dog in the particular conflicts in which they are currently engaged, among
other factors, Israel’s links to historical victimization might render it more credible as a nation
engaged in acts that are necessary to ensure its very survival.
National strength and achieving triumph in the face of adversity
At the same time as observers might sympathize with the underdog, they are inspired by tri-
umph [4]. Indeed, it is notable that U.S. President Trump’s refrain to ‘make America great
again’, both implicitly and explicitly in the accompanying rhetoric, highlights America as vic-
torious as it comes out of a period of victimization, unjust treatment and disadvantaged status
on the world stage. Accordingly, national strength and pride will have been deservedly earned.
In contrast to depictions of vulnerability, when a group’s strengths are salient, the probabil-
ity of being perceived as equal and treated with mutual respect increases [4,21]. When a group
is regarded as powerful, actions that are taken that could be construed as unjust are seen as
more normative, and intervention from outsiders as less likely to be necessary or effective in
changing the situation [22]. In essence, people may ‘shift standards’ in how they evaluate injus-
tice, with a bias that favors the more powerful [22,23].
This said, recognizing the strengths of a group also elicits expectations of moral responsibil-
ity and obligation. Indeed, when members of a group were subjected to harm in the past (e.g.,
the Holocaust), and they persevered to overcome their suffering, observers expected them to
have learned from the experience [24] and, as a result, be better, stronger people, and they
were held to a particularly high standard of moral conduct [16,24,25]. Thus, when a nation in
conflict is regarded as strong or triumphant, it may risk observers’ condemnation of its actions
against an opponent.
The present research
The goal of the present research was to determine whether citizens from a nation not directly
involved in an international conflict were differentially influenced by perceptions of the vul-
nerability or strength of the nations in conflict, and the implications for the perceived justifi-
ability of their conflict actions. Three studies were conducted to assess Canadians’ perceptions
of the conflict actions of the U.S. and Israel. In particular, the U.S. engaged in a war with Iraq
following the September 11, 2001 attacks on the World Trade Towers and the Pentagon by the
terrorist organization al-Qaida. The American government claimed that Iraq was harbouring
weapons of mass destruction, making it a threat to Western countries, including the U.S. The
allied invasion began in March 2003, with a further surge of U.S. troops in 2007; all U.S. com-
bat troops withdrew by December 2011. For decades, Israel has been engaged in an ongoing
conflict with Palestinians within the West Bank and Gaza, a struggle that is at the core of the
Arab-Israeli conflict. Israel maintained that the Palestinians and their Middle Eastern allies
were Israel’s sworn enemies who were intent on eradicating the country and people, and thus
represented an existential threat.
Perceived justifiability of international conflict actions
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Canada was a political ally to both nations, but was not involved in the conflicts being con-
sidered. It was expected in Study 1 that differential perceptions of the vulnerability of the secu-
rity and safety of these nations, as well as their strength to contend with the threat would
mediate perceptions of the moral justifiability of their conflict actions. Study 2 assessed the
moderating role of Canadians’ shared identity with each nation. Studies 1 and 2 were con-
ducted in 2007 and 2009, respectively, in the era of U.S. President George W. Bush. Study 3
assessed these same perceptions in 2018 when the U.S. was under the presidency of Donald J.
Trump. Thus, we were able to evaluate whether changes in the priorities of U.S. domestic and
international policies altered the factors contributing to Canadians’ perceptions of the moral
justifiability of conflict actions.
Study 1
The credibility of a nation claiming victim status varies not only with the historical persecution
of its peoples, but as well as a function of perceived size relative to its opponent, the resources
at its disposal, the aggressiveness of the actions taken, and whether the conflict is viewed as
deserved or brought upon itself [3,26]. These elements need to be balanced so that the nation
in conflict is not itself perceived as the top dog, but rather as the victim of an enemy that is evil
and of sufficient strength that the nation’s survival is at risk [1,27,28]. In Study 1, it was
hypothesized that compared to Israel, the U.S. would be perceived as lower in the vulnerability
of its safety and survival, and higher in its strength to confront its adversaries successfully, and
these perceptions would mediate differences in the perceived justifiability of conflict actions.
Materials and methods
From March to August 2007, first year university students at a Canadian university (N= 91;
female n= 57; male n= 34) ranging from 18 to 54 years of age (M= 22.6; SD = 6.58 years) par-
ticipated in an online study concerning perceptions of international conflicts. The majority of
students reported their ethnicity to be White (75.8%), with the remainder identifying as Black
(2.2%), Asian (14.6%), or other (7.4%). Students who self-reported being Jewish, Muslim or of
Middle Eastern or American origins were not included in the analyses, as they may be less
likely to perceive themselves simply as observers of the conflicts.
After providing informed consent, participants were randomly assigned to complete one of
two versions of a questionnaire. The questions were substantively the same, but were modified,
where relevant, to either refer to the Israeli/Palestinian (n= 46) or U.S./Iraq conflicts (n= 45).
Upon completion, participants were debriefed and awarded course credit for their participa-
tion. All procedures were approved by the Carleton University Research Ethics Board-B
(#108382).
Nations’ vulnerability. Perceptions of the extent to which the safety and survival of each
nation in conflict was threatened was assessed using three items, including “Full American
withdrawal from Iraq would threaten the safety and survival of the USA”, “If the USA did not
actively fight against terrorism, its own safety and survival would be threatened”, and “The
USA has become highly vulnerable to terrorist acts on its home ground”. The modified items
for the Israel/Palestinian conflict were “Full recognition of Palestinian demands would
threaten the safety and survival of Israel”, “If Israel did not actively fight against terrorism, its
own safety and survival would be threatened”, and “Israel’s position in the Middle East is
highly vulnerable.” Responses were on 7-point scales, ranging from 1 ‘disagree strongly’ to 7
‘agree strongly’, and were averaged to provide an index of perceived vulnerability (Cronbach’s
alpha = .74). It is noted that the items assessing perceptions of the vulnerability of the two
nations were not identical, reflecting differences in specific features of the respective conflicts.
Perceived justifiability of international conflict actions
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Importantly, when the single item in common was analysed, the pattern of findings was identi-
cal. Thus, results using the 3-item measure were reported, as findings based on multi-item
measures may be more robust across contexts.
Nations’ strength. Perceptions of the strength of the two nations in conflict were assessed
using two items, including “The USA/Israel has sufficient military might to protect itself
against a threat from any other nation(s) in the Middle East” and “The USA/Israel has become
a relatively powerful nation that, realistically, does not have to be concerned about its security.”
These items were rated on 7-point scales, ranging from 1 ‘disagree strongly’ to 7 ‘agree
strongly’, and were averaged to provide an index of perceived strength, (r= .31, p= .003).
Justifiability of conflict actions. Participants indicated their agreement with each of five
statements, including for example, “The Iraqis should be held accountable for American
actions to protect itself against terrorist violence” and “Israel is justified in its harmful actions
against the Palestinians”, on a 7-point rating scale ranging from 1 ‘strongly disagree’ to 7
‘strongly agree’. Identical items were used for the two nations in conflict, modifying the target
groups being referred to (Cronbach’s alpha = .80).
Results and discussion
Differences in perceptions of U.S./Iraq and Israel/Palestinian conflicts. Analyses of
variance (ANOVAs) conducted to assess differences in perceptions of the two nations in con-
flict indicated that, as expected, Israel was perceived to be more vulnerable and less powerful
than the U.S. (Table 1). Moreover, in line with research demonstrating that the actions of
underdogs, especially those that continue to be victimized, are more likely to be perceived as
morally legitimate [16,17], participants regarded Israel’s conflict actions as more justified than
those of the U.S.
Although it might have been expected that perceptions of vulnerability and strength would
be inversely correlated, the partial correlation (controlling for nation) between them was not
significant, partial r = -.08, p= .486. Thus, a nation can be vulnerable to its enemies, but still be
perceived to have the power to defeat them.
Mediated relations between nations in conflict and perceived justifiability of actions.
To assess whether the differences in the perceived justifiability of the actions of the two nations
(with Israel coded 0 and the U.S. coded 1) were mediated by perceptions of vulnerability and
strength, the PROCESS macro (version 3.3) was used, applying the mediation model 4 [29].
The macro was set to use bootstrapping procedures with 5000 resamples. The full model that
included the nations in conflict and the two mediating variables was significant, R
2
= .404, F
(3,86) = 19.44, p<.001. The direct path between nation in conflict and action justifiability was
not significant, b= -0.23, se = 0.25, CI
.95
[-0.72, 0.25]. The 95% confidence intervals for each
mediator indicated that, as seen in Fig 1, this relation was mediated by perceived vulnerability,
Table 1. Perceptions of the Israeli-Palestinian vs. U.S.- Iraq Conflicts in Study 1.
Israel—Palestinian U.S.—Iraq
Mean SD Mean SD eta
2
Perceived vulnerability 4.92 1.17 3.46 1.37 .251��
Perceived strength 3.24 1.16 4.22 1.23 .146��
Justifiability of actions 4.08 0.91 3.11 1.30 .159��
Mean scores could range from 1 to 7.
�� p<.01
�� p<.001
https://doi.org/10.1371/journal.pone.0220303.t001
Perceived justifiability of international conflict actions
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Effect = -0.69, se = 0.17, CI
.95
[-1.04, -0.38], but not by national strength, Effect = -0.05,
se = 0.10, CI
.95
[-0.27, 0.15].
In short, as expected, Israel, whose Jewish people have been historically victimized, was
seen as being more vulnerable in terms of its safety and survival, and as having less strength to
protect itself than the U.S. Notably, the items assessing perceptions of vulnerability differed to
reflect the contextual features of the conflicts in question, and hence such perceptions might
have reflected differences in the items. However, even when only the item in common (“If the
U.S./Israel did not actively fight against terrorism, its own safety and survival would be threat-
ened”) was analysed, the same pattern of results was evident. Perceived vulnerability, but not
the strength of a nation, accounted for further differences in perceptions of the justifiability of
the conflict actions. Thus, it appears that factors that enhance a nation’s claim to victimization
may play a stronger role in how citizens of an observer nation regard their conflict actions [8]
than does the perceived capacity of a nation to protect itself from its enemies.
Study 2
If an observer identifies with the struggles of a victimized group, as a matter of social justice
there is a propensity to sympathize with, and root for, the underdog [4]. Hence, while continu-
ing to emphasize its collective victimization and vulnerability, nations in conflict may attempt
to tie their narrative to the values and priorities of others in the international community in an
effort to strengthen observers’ solidarity and moral backing [19]. In this regard, Israel’s identi-
fication with the ‘war for democracy’ was a strategy for eliciting a shared identity with observer
nations, thereby giving licence for taking protective actions [28,30], and consolidating percep-
tions that conflict actions were necessary and legitimate [31]. In effect, observers who perceive
a ‘common moral community’, particularly in relation to a historically victimized nation, may
be especially sensitive to its continued vulnerability, and the need for support [32]. In contrast,
in the absence of such a sense of shared identity, observers might distance themselves, even
from those who have been historically victimized (e.g., psychological numbing [33]), and as a
result be less likely to acknowledge or empathize with a nation’s vulnerability, thereby dimin-
ishing the extent to which their conflict actions are regarded as legitimate [34].
However, receiving a shared identity could also confer a greater perception of national
strength and the resources to contend with identity threats. Such identification with a well-
positioned ingroup might enhance perceptions of a nation’s capacity to protect itself. If so, it is
possible that the greater perceived strength of a nation in conflict that is derived from observ-
ers’ shared identity could trigger a sanctioning process, wherein the nation in conflict is subse-
quently held to an especially high standard of moral conduct, with expectations of restraint in
Fig 1. Unstandardized path coefficients (standard errors) of model assessing the mediating roles of perceptions of vulnerability and strength in the relation
between nation in conflict and perceived justifiability of actions (Study 1). ��� p<.001. a
1
b
1
= Indirect effect of nation in conflict on action justifiability through
perceived vulnerability; a
2
b
2
= Indirect effect of nation in conflict on action justifiability through perceived strength; c’ = Direct effect of nation in conflict on action
justifiability.
https://doi.org/10.1371/journal.pone.0220303.g001
Perceived justifiability of international conflict actions
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its actions toward an opponent [28,35]. In this instance, citizens of an observer nation may be
motivated by the need to maintain the moral integrity of the shared ingroup identity [35,36],
and as a result regard conflict actions as less justified. Thus, it was hypothesized that the medi-
ating role of the perceived vulnerability and strength of the nations in conflict on perceptions
on the justifiability of their actions would be conditional on levels of shared identification.
Method and materials
From March through May 2009, 315 community participants were recruited through posters
and advertisements on different Canadian websites inviting them to take part in an online
study concerning perceptions of international conflicts. The majority of participants were
female (n= 215; male n= 100), ranging from 18 to 66 years of age (M= 33.17; SD = 10.75
years), and reported their ethnicity to be White (73.0%), with the remainder Black (1.6%), and
Asian (18.8%), or other (6.6%). As in Study 1, participants who self-reported being Jewish,
Muslim or of Middle Eastern or American origins were not included in the analyses.
After providing informed consent, participants were randomly assigned to complete one of
two versions of the questionnaire, which either referred to the Israeli/Palestinian (n= 156) or
U.S./Iraq conflict (n= 159). Upon completion of the study, participants received an online
debriefing along with a $10 gift certificate for their participation.
As in Study 1, measures of the perceived vulnerability (Cronbach’s alpha = .63) and strength
(r= .44, p<.001) of the two nations, and the justifiability of their actions (Cronbach’s alpha =
.81) were included. Shared identity with the target nations was assessed by asking participants
to rate Israel and the U.S. (among a list of 15 other nations) in terms of their perceptions that
each shared common values and priorities with Canadians, using a 7-point scale ranging from
1 ‘nothing at all in common’ to 7 ‘a lot in common’. In addition, the extent to which Israel and
the U.S. (along with a list of 11 other nations) was perceived to be “typical of what it means to
be a free and democratic nation” was rated using a 7-point scale ranging from 1 ‘not at all typi-
cal’ to 7 ‘extremely typical’. It is recognized that ascribing to democratic values is only one of
many possible features of a shared national identity, and may not be a feature that is important
to Canadians’ identification with all national identities. However, in the context of interna-
tional conflicts in which this rhetoric has been made salient, as both the U.S. and Israel had
done (i.e., the ‘war on democracy’), it was thought to be an important aspect of shared identifi-
cation. Indeed, responses to these two items were highly correlated, r= .67, p<.001, and so
they were combined to create a single index of shared identity. Importantly, the pattern of
results remained the same whether a one- or two-item index of shared identity was used.
Results and discussion
Differences in perceptions of U.S./Iraq and Israel/Palestinian conflicts. ANOVAs con-
ducted to assess differences in perceptions of the two nations indicated that, as in Study 1,
Israel was perceived to be more vulnerable and have less strength to protect itself than the U.S.
(Table 2). Perhaps the greatest difference in perceptions was the extent to which the two
nations were perceived to share a common identity with Canadians, in that Americans were
considered to be much more aligned with Canadian identity. Nonetheless, participants were
more likely to perceive Israel’s conflict actions as more justifiable than those of the U.S.
Perceptions of vulnerability and strength (controlling for nation) were negatively corre-
lated, partial r = -.29, p<.001. The significance of this relation, which was absent in Study 1,
may be due to the greater variability emanating from a community sample. Although both
lower perceived vulnerability, r= -.27, p<.001, and greater strength, r= .25, p<.001, were
associated with a shared identity, neither of these relations was significant when controlling
Perceived justifiability of international conflict actions
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for nation, partial rs = .02. Shared identity was not directly related to perceptions of the justifi-
ability of conflict actions, r= -.02, p= .734.
Conditional mediated model as a function of shared identity. To assess whether the
mediated pathways between the nations in conflict and the perceived justifiability of their
actions depended on observers’ shared identity, a conditional mediation analysis was con-
ducted. To do so, the PROCESS macro (version 3.3) was used, applying model 7 [29], which
assessed whether the moderating variable (shared identity) attenuated or increased differences
in the relation between the predictor (nation in conflict, with Israel coded 0 and the U.S.
coded 1) and mediators (perceived vulnerability and strength), thereby influencing differences
in the perceived justifiability of their respective conflict actions. The macro was set to use
using bootstrapping procedures with 5000 resamples. Variables were mean centred for the cal-
culation of the cross-products (interactions).
As seen in Table 3, shared identity significantly moderated differences in perceptions of the
vulnerability, R
2
= .029, F(1,311) = 10.81, p= .001, but not strength of the two nations, R
2
=
.001, F(1,311) = 0.20, p= .654. Simple slope analyses conducted at 1 SD above and below the
mean ratings of shared identity (Fig 2) indicated that at lower levels of shared identification
with the nation in conflict, differences in their perceived vulnerability were exacerbated, b=
-1.87, se = 0.33, p<.001; with increasingly high levels of shared identification, differences in
the perceived vulnerability of the U.S. and Israel dissipated, b= -0.45, se = 0.26, p= .088. This
pattern was primarily accounted for by the positive relation between shared identification with
the U.S. and perceptions of the vulnerability, b= 0.29 (se = .10), p= .004, that was absent with
Israel, b= -0.12 (se = .07), p= .10.
As hypothesized, the mediating role of perceived vulnerability in the prediction of the
moral justifiability of the conflict actions was conditional on levels of shared identity,
Index = 0.19, CI
.95
[0.07, 0.33]. Contrary to expectations, the mediating role of vulnerability
was greatest when the nation in conflict was not seen to share a common identity with Canadi-
ans, Effect = -0.88, se = 0.21, CI
.95
[-1.30, -0.51], whereas mediation was no longer evident
when nations were strongly perceived to share an identity, Effect = -0.21, se = 0.14, CI
.95
[-0.49,
0.05]. The absence of a significant mediating role of the perceived strength of the nations in
conflict was not altered by levels of shared identity, Index = 0.01, CI
.95
[-0.04, 0.53]
In sum, as in Study 1, perceptions of Israel and the U.S. differed, with the U.S. being seen as
less vulnerable and stronger. Not surprisingly, participants indicated that Canadians shared a
stronger identity with the U.S than with Israel. This shared identity was not directly related to
the perceived justifiability of conflict actions, possibly because identification in itself might
elicit multiple competing psychosocial motivations. For example, observers who perceive a
strong shared identity might be motivated to enhance the ingroup identity by justifying
Table 2. Perceptions of the Israeli-Palestinian vs. U.S.- Iraq Conflicts in Study 2.
Israel—Palestinian U.S.—Iraq
Mean SD Mean SD eta
2
Shared identity 3.15 1.32 5.81 0.95 .572��
Perceived vulnerability 4.72 1.15 3.78 1.25 .126��
Perceived strength 3.41 1.11 4.23 1.32 .101��
Justifiability of actions 4.03 1.14 3.57 1.17 .038��
Mean scores could range from 1 to 7.
�� p<.01
�� p<.001
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Perceived justifiability of international conflict actions
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conflict actions, or conversely, experience greater collective guilt for perpetrating harm [37] or
hold higher expectations of restraint to maintain the moral integrity of the identity [35,36].
However, in the absence of a shared identity, participants were more likely to regard Israel as
vulnerable (relative to the U.S.), and under these conditions, vulnerability was an especially
strong mediator of the differences in the perceived justifiability of each nations’ actions.
Although not predicted, this latter finding is in line with research suggesting that support for
the underdog might be abandoned when the context is perceived to be self-relevant, and par-
ticularly when the consequences associated with the outcomes are high [2]. Similarly, pre-
existing affinities may serve to over-ride processes that would elicit support for the underdog
in favor of ingroup biases [38]. The present study did not include measures of self-relevance or
personal affinities, but it is possible that shared identification similarly served to diminish the
salience of factors that would otherwise evoke underdog support. In contrast, when partici-
pants had no vested identity interest in the conflict, they perceived the nation that had a long
history of victimization (Israel) as most vulnerable, and hence more justified in their actions.
Study 3
The rhetoric of the U.S. appeared to shift under the presidency of Donald J. Trump. Although
the U.S. continued to assert a narrative of collective victimization, it also highlighted triumph
in the face of such adversity (‘make America great again’). Although this message might have
been intended for a domestic audience, it was nonetheless broadcast around the world. In
addition, international policies (including economic agreements, the U.S. position on fossil
fuels and climate change, military decision-making, etc.) isolated the U.S. from allies with
which it had historically shared a common identity, including Canada. Thus, it was expected
in Study 3 that a sense of shared identity would be weaker. Ironically, based on the findings of
Studies 1 and 2, this is precisely when a nation’s perceived vulnerability would be a strong pre-
dictor of observers’ judgements of the moral legitimacy of its conflict actions.
Study 3 sought to assess the predictors of Canadians’ perceptions of the justifiability of the
actions of the U.S. and Israel under these changed conditions. Although the specific disputes
Table 3. Unstandardized Coefficients of Model Assessing the Moderating Role of Shared Identity on the Mediated Relations between Nation in Conflict and Per-
ceived Justifiability of Actions (Study 2).
Effect Coefficient se Lower CI
.95
Upper CI
.95
Mediator 1 = Vulnerability
Nation -1.16 0.21 -1.57 -0.74
Shared identity 0.09 0.06 -0.04 0.21
Nationidentity 0.40 0.12 0.16 0.64
Mediator 2 = Strength
Nation 0.75 0.22 0.32 1.18
Shared identity 0.03 0.06 -0.10 0.15
Nationidentity 0.06 0.13 -0.19 0.31
Outcome (Y) = Action justifiability
Nation -0.14 0.13 -0.39 0.11
Vulnerability 0.47 0.05 0.37 0.57
Strength 0.14 0.05 0.05 0.24
Note: Coefficients represent the effects of the predictor (nation in conflict: 0 = Israel, 1 = U.S.) and moderator (shared identity) variables and their interaction on each of
the mediation variables (perceived vulnerability and strength of the nations), followed by the unique effects of the predictor and mediating variables on the outcome
variable (justifiability of conflict actions).
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between Israel, the Palestinians, and the regional Arab nations were different, on the whole,
Israel’s conflict situation remained the same. In Iraq, at the invitation of the Iraqi government,
in 2014, the U.S. launched a military intervention to combat the Islamic State of Iraq and the
Levant (ISIL). The U.S. maintained an active role in this civil war, but in February 2018,
announced that it would begin to withdraw troops from Iraq. In addition to these conflicts, in
Study 3, Canadians were asked about their perceptions of the increasingly hostile relationship
between the U.S. and North Korea. The tension between the U.S. and North Korea had been
present for decades, particularly in relation to the North Korean development of nuclear mis-
siles. Successive U.S. presidents either failed to reach an agreement with North Korea, or agree-
ments were not honoured. At the time of conducting this study, the U.S. was sending strong
Fig 2. Simple Slopes of the relations between shared Identity and perceived vulnerability of Israelversus the U.S.
https://doi.org/10.1371/journal.pone.0220303.g002
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and provocative signals to North Korea, and the possibility of a summit between President
Trump and North Korean Supreme Leader Kim Jung-un had not yet been announced. Thus,
the U.S. conflict with North Korea was of a diplomatic rather than military nature.
Method and materials
In January through February 2018, participants were recruited using Amazon MTurk, with
access to the survey restricted to Canadian citizens (N= 300; 179 males, 115 females, 6 other
gender) greater than 18 years of age (M= 32.06; SD = 9.64 years). The majority of participants
reported their ethnicity to be White (71.8%), with the remainder Black (4.0%), and Asian
(13.9%), or other (10.3%). After providing informed consent, participants were randomly
assigned to complete one of three versions of the questionnaire, which either referred to the
Israeli/Palestinian (n= 94), U.S./Iraq conflicts (n= 91), or the conflict between the U.S. and
North Korea (n= 115). Participants who self-reported being Jewish, Muslim, or of Middle-
Eastern, American, or North Korean origins were assigned to survey conditions that were not
directly associated with their religious or national background. Upon completion of the study,
participants received an online debriefing along with $3USD MTurk payment. Measures of
the perceived vulnerability (Cronbach’s alpha = .65) and strength (r= .42, p<.001) of the U.S.
and Israel, the justifiability of their conflict actions (Cronbach’s alpha = .79), and Canadians’
sense of shared identity (r= .47, p<.001) were identical to those used in Studies 1 and 2, with
modification, where appropriate, to be inclusive of reactions to the U.S. actions toward North
Korea. Specifically, the perceived vulnerability item “Full American withdrawal from countries
targeted by terrorists would threaten the safety and survival of the USA” was replaced with
“American aggression toward its enemies would threaten the safety and survival of the USA”.
In addition, items making reference to Iraq were replaced with North Korea.
Results and discussion
Differences in perceptions of the nations in conflict. ANOVAs conducted to assess dif-
ferences in perceptions of the three intergroup conflicts indicated that, as in the previous stud-
ies, Israel was perceived to be more vulnerable than the U.S., to have less power to protect
itself, and to share less of a common identity with Canadians (Table 4). In addition, partici-
pants were more likely to perceive Israel’s actions to be more justified compared to those of
the U.S. in Iraq, but not those of the U.S. toward North Korea, perhaps because the latter had
not reached a point of military aggression, or perhaps because North Korea represented a
greater threat to the U.S. and its allies.
Partial correlations (controlling nation in conflict) indicated that, just as in Study 2, percep-
tions of national vulnerability and strength were negatively correlated, partial r = -.18, p=
Table 4. Perceptions of the Israel vs. U.S. Conflicts in Study 3 (2018).
Israel-Palestinian U.S.—Iraq U.S.—North Korea
Mean SD Mean SD Mean SD eta
2
Shared identity 3.38
a
1.23 5.44
b
1.13 5.45
b
1.18 .397��
Perceived vulnerability 4.41
a
1.28 3.87
b
1.26 3.75
b
1.45 .043��
Perceived strength 3.90
a
1.24 4.61
b
1.43 4.88
b
1.39 .086��
Justifiability of actions 3.72
a
1.24 3.30
b
1.27 3.90
a
1.25 .039��
Mean scores could range from 1 to 7. Columns with different subscripts differed at p<.05.
�� p<.01
�� p<.001
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.002. In addition, shared identity was associated with perceptions of strength, r= .30, p<.001,
and the justifiability of conflict actions, r= .15, p= .011, but was not directly related to per-
ceived vulnerability, r= -.01, p= .804.
To assess changes over time, only responses to the conflicts that were assessed in both 2009
and 2018 were compared, namely the Israeli-Palestinian and U.S.-Iraq conflicts. As hypothe-
sized, in a 2 (time) x 2 (nation in conflict) between-groups ANOVA, the interaction in relation
to a shared identity with the nation in conflict was significant, F(1,494) = 7.95, p= .005, eta
2
=
.016. In particular, as seen in Tables 2and 4, although there were no differences over time in
Canadians’ identification with Israel, in 2018, Canadians reported a weaker shared identity
with the U.S. It is possible that the policy shifts of the U.S. in relation to its allies were linked to
these differences over time. In addition, main effects for time were found, in that perceptions
of the strength of both Israel and the U.S. to protect their interests increased over the 10 years,
F(1,494) = 12.35, p<.001, eta
2
= .024, and the perceived justifiability of their conflict actions
decreased, F(1,494) = 7.05, p= .008, eta
2
= .014. Although these effect sizes were small, this pat-
tern of change over time is in keeping with increasingly vocal global opposition to both Israel’s
and the U.S.’s intervention in the Middle East. It is also in line with the hypothesized relation-
ship between the perceived strength of a nation and evaluations of the justifiability of its con-
flict actions [24,28].
Conditional mediation model as a function of shared identity. To assess whether the
mediated model predicting the perceived justifiability of the conflict actions of the nations was
moderated by shared identity with Israel versus the U.S., a conditional mediation analysis
(PROCESS model 7) was conducted. National conflict was treated as a multi-categorical vari-
able, wherein Helmert coding was employed. Comparison 1 (X1) assessed differences between
the Israel-Palestinian conflict and the mean of the two U.S. conflicts; X2 compared responses
to the U.S. in the context of the Iraq vs. North Korean conflicts.
As reported in Table 5, a shared identity moderated the relation between nations in conflict
and their perceived vulnerability, R
2
= .052, F(2,292) = 8.60, p<.001, and in particular moder-
ated the difference in the perceived vulnerability of Israel and the U.S. (X1), rather than varia-
tions in perceptions of the vulnerability of the U.S. in the different conflict arenas (X2).
Specifically, simple slope analyses indicated that, as in Study 2, differences in the perceived vul-
nerability of the two nations were most evident at lower levels of shared identification with the
nations in conflict, b= -1.40, se = 0.24, p<.001; at higher levels of shared identification there
was no difference in the perceived vulnerability of Israel and the U.S., b= 0.30, se = 0.37, p=
.412 (Fig 3). As in Study 2, this pattern was primarily accounted for by the positive relation
between perceptions of the vulnerability and shared identification with the U.S, whether the
conflict involved either Iraq, b= 0.41 (se = .12), p= .001, or North Korea, b= 0.32 (se = .10),
p= .003, a relation that was largely absent with respect to Israel, b= -0.20 (se = .10), p= .057.
In addition, perceiving a shared identity moderated the mediating role of perceived vulner-
ability in accounting for differences in perceptions of the justifiability of the actions of Israel
versus the U.S., Index (X1) = 0.24, se = 0.07, CI
.95
[.11, .37]. As in Study 2, the mediating role of
perceived vulnerability was greatest when observers did not share a common identity with the
nation in conflict, Effect = -0.55, se = 0.12, CI
.95
[-0.81, -0.32], whereas mediation was no longer
evident when they were strongly co-identified, Effect = 0.13, se = 0.17, CI
.95
[-0.22, 0.45]. This
mediated relation did not account for differences in the perceived justifiability of U.S. actions
in Iraq versus North Korea, Effect (X2) = -0.05, se = 0.08, CI
.95
[-0.21, 0.11], nor was this medi-
ated relation moderated by shared identity, Index (X2) = -0.04, se = 0.07, CI
.95
[-.18, .11]. Thus,
it appears that this counter-intuitive finding associated with the greater role of perceived vul-
nerability when observers do not report a shared identity with the nations in conflict replicated
across time and with consideration of another American conflict.
Perceived justifiability of international conflict actions
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Uniquely in Study 3, shared identity moderated the relation between nation in conflict and
perceptions of national strength, R
2
= .018, F(2,292) = 3.04, p= .049, accounting for the varia-
tions in perceptions of the U.S. in Iraq and North Korea (X2), rather than variations between
Israel and the U.S. (X1) (Table 5). Specifically, as shown in Fig 4, when Canadian participants
were less inclined to report a shared identity, their perceptions of the strength of the U.S. in
North Korea were greater than they were in relation to the U.S. in Iraq, b= 1.08, se = 0.40, p=
.008; at higher levels of shared identification there was no difference in the perceived strength
of the U.S. in the North Korean conflict, b= -0.07, se = 0.24, p= .781. In effect, while percep-
tions of U.S. strength in regard to North Korea were independent of sharing a common iden-
tity with the U.S., b= -0.02 (se = .11), p= .888, shared identification and perceptions of
national strength were positively related when the U.S was in Iraq, b= 0.36 (se = .13), p= .006,
and for Israel, b= 0.27 (se = .11), p= .016. Such variations of shared identity did not alter the
absence of a mediating role of perceived strength in the differences in the perceived justifiabil-
ity of actions taken in the two U.S. conflict arenas, Index(X1) = -0.01, se = 0.014, CI
.95
[-.04,
.01], Index(X2) = -0.03, se = 0.03, CI
.95
[-.09, .02].
To summarize, as expected, Canadians’ sense of shared identification with the U.S. (but not
Israel) diminished in 2018 relative to 2009. As in Studies 1 and 2, Israel was seen as more vul-
nerable than the U.S. in terms of its safety and survival, and as having less power to protect
Table 5. Unstandardized Coefficients of Model Assessing Moderating Role of Shared Identity on the Mediated Relations between Nation in Conflict and Perceived
Justifiability of Actions (Study 3).
Effect Coefficient se Lower CI
.95
Upper CI
.95
Mediator 1 = Vulnerability
Nation
X1 Israel vs. US -0.55 0.23 -1.00 -0.10
X2 US: Iraq vs. N. Korea -0.06 0.21 -0.45 0.35
Shared identity 0.18 0.06 0.05 0.30
Nation Identity
X1 Israel vs. US 0.56 0.14 0.29 0.83
X2 US: Iraq vs. N. Korea -0.10 0.16 -0.41 0.22
Mediator = Strength
Nation
X1 Israel vs. US 0.39 0.24 -0.08 0.86
X2 US: Iraq vs. N. Korea 0.51 0.22 0.08 0.93
Shared identity 0.21 0.07 0.07 0.34
Nation Identity
X1 Israel vs. US -0.09 0.14 -0.37 0.18
X2 US: Iraq vs. N. Korea -0.38 0.17 -0.70 -0.05
Outcome (Y) = Action justifiability
Nation
X1 Israel vs. US -0.07 0.15 -0.23 0.36
X2 US: Iraq vs. N. Korea 0.63 0.16 0.32 0.95
Vulnerability 0.42 0.05 0.33 0.52
Strength 0.07 0.05 -0.02 0.17
Note. Coefficients represent the effects the predictor (nation in conflict comprising two Helmert coded contrast variables) and moderator (shared identity) and their
cross-products on each of the mediation variables (perceived vulnerability and strength of the nations), followed by the unique effects of the predictor and mediating
variables on the outcome variable (justifiability of conflict actions). X1 and X2 are the Helmert contrasts that were entered to assess the effects of nation and the relevant
criterion variables.
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itself. In the absence of a shared identity, Canadians regarded Israel as even more vulnerable,
which in turn, was associated with greater perceptions of the justifiability of conflict actions. It
would appear that, once again, Israel was more likely to garner support for its actions to pro-
tect its vulnerable status when observers did not have a vested identity interest in the nations
in conflict. Moreover, despite the deteriorating relationship between Canada and the U.S., and
the diminished sense of shared identity, the pattern of mediated relations predicting the legiti-
macy Canadians attributed to the conflict actions remained the same across the studies. At the
Fig 3. Simple Slopes of the relations between shared identity and perceived vulnerability of Israel versus the U.S. in the Iraq and North Korean conflicts.
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Perceived justifiability of international conflict actions
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same time, the U.S. was viewed as stronger and its conflict actions as more justified when they
involved a diplomatic strategy, as was the case in North Korea. This said, the differential per-
ceptions of U.S. strength across the conflict arenas dissipated when there was a strong shared
identity, suggesting that when the identity was self-relevant, other factors contributed to
observers’ evaluations of American conflict actions [32].
General discussion
The findings of the present investigation were consistent with the view that observers of a
nation in conflict will be most sympathetic when the nation is perceived to have been victim-
ized, and its safety and survival continues to be tenuous [16,24,25]. In particular, despite the
Fig 4. Simple Slopes of the Relations between Shared Identity and Perceived Strength of Israel versus the U.S. in the Iraq and North Korean conflicts.
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fact that the nations whose actions were evaluated in the present studies varied considerably in
their histories and current treatment globally, and that both are often considered top dogs in
the conflict arenas in which we placed them (Israel’s actions in relation to the Palestinians; U.
S. actions in relation to Iraq/North Korea), the more vulnerable their safety and survival was
perceived to be, the greater the legitimacy that was attributed to their actions. Moreover, the
greater perceived vulnerability of Israel, whose Jewish population has an entrenched history of
persecution, was found to account for differences in how their conflict actions were viewed in
comparison to those of the U.S. It seems that status as an underdog, or victim, in a conflict
may vary as a function of perceptions of the historical experiences of a group or nation that
render victim claims to be more or less credible [12].
In the present study, whether citizens of an observer country viewed the respective nations
as sharing common goals and democratic values was a consistent moderator of the differences
in how the two nations in conflict were regarded. As expected, Americans were seen as sharing
more in common with Canadians than were Israelis. However, a stronger shared identity
diminished the extent to which the nations in conflict were differentially regarded in terms of
their vulnerability, and attenuated the importance of such vulnerability in rendering percep-
tions of their actions to be morally justified. This may be counter-intuitive, as it was expected
that strong identification with a nation would have provided a motivational basis for empa-
thizing with its vulnerability in the conflict in which it was embedded, and hence, the per-
ceived justifiability of its actions. Indeed, a shared identity and perceptions of U.S.
vulnerability were positively related, such that, when there was a strong sense of shared iden-
tity, Canadians’ perceptions of the vulnerability of the U.S. were equal to the perceived vulner-
ability of Israel. As vulnerability was a key predictor of the justifiability of conflict actions,
shared identification appears to serve a top dog nation such as the U.S. well. In contrast, by
enhancing the underdog’s shared identity with observer nations, concerns about its survival
may be reduced, possibly triggering the tendency to hold groups that have been historically
victimized to a higher standard of moral behaviour, and to do no harm to others [24,36]. Alter-
natively, given Canada’s geographical proximity to the U.S., it might be that a strong shared
identity reflected a recognition of the common fate that Canadians might experience with the
U.S. and hence the need to take protective actions. In this regard, the meaning that is ascribed
to the shared identity could itself influence perceptions and actions of the ingroup and observ-
ers alike [32]. For example, had the index of identity highlighted shared humanitarianism,
rather than being a free and democratic nation, the conditional processes associated with the
justifiability of conflict actions might have been different. Finally, it should be noted that the
current data are correlational, and so conclusions about the role of a shared identity can only
be tentatively suggested.
Although the U.S. and Israel were perceived to differ in their strength to defend themselves
from their opponents, these perceptions did not account for differences in observers’ percep-
tions that conflict actions were less justified. Perceptions of strength and vulnerability were
mildly negatively correlated in Studies 2 and 3, but it is clear that they are not simply the
inverse of one another. In other contexts, numerous groups that experience persistent collec-
tive victimization advocate for recognition of their strengths, resilience, and perseverance [39].
While such a discourse is more likely to gain the respect of outgroups [4,21], a concern is that
presenting the group from a strength-based perspective might undermine support for actions
that would challenge the status hierarchy [6], along with diminishing allies’ perceptions that
outside intervention is necessary or effective [22]. Some have further suggested that a power
advantage could be seen as a moral disadvantage [28,38]. While this might be true, in the pres-
ent study, the salience of a nation’s strength did not seem to have consequences, favorable or
Perceived justifiability of international conflict actions
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otherwise, for the perceived legitimacy of its actions to protect its identity from existential
threats.
The present investigation assessed the perceptions of citizens of a third-party observer
nation, without assessing the views of citizens of the nations in conflict, namely Americans or
Israelis themselves. It might well be that the political spin that leaders use to account for their
conflict actions are more effective in mobilizing ingroup support. For example, when ingroup
members encounter a threat, group identification is increased [40]. Perceiving the ingroup as
strong and resilient may create the basis for collective pride [41], and group members are
more likely to follow and be inspired by a leader who is viewed as triumphant in the face of
adversity [4]. Taken to an extreme, ingroup glorification can further serve to minimize
ingroup members’ recognition of the emotional suffering of their opponent and to dehuman-
ize them, thereby reducing collective guilt and justifying their own group’s actions [42,43].
Thus, the narrative of President Trump to ‘make America great again’, particularly in the face
of threats from an apparently hostile international community, might well be effective in
strengthening support among his domestic following, even as it alienates American allies.
Indeed, followers might otherwise be tempted into complacency, or might even protest actions
that, without such a narrative, they would otherwise perceive as unjust or too costly to the
well-being of the ingroup.
Despite Canadians diminished identification with their American neighbour in 2018, the
relations between perceptions of the vulnerability of the nations and the justifiability of their
conflict actions remained. Assessing these issues over time has important implications for
understanding shifts in the views of nations involved in ongoing conflicts. In particular, both
the U.S. and Israel were perceived to be less vulnerable and to be better positioned to protect
themselves in 2018. This shift might have especially important implications for Israel, as per-
ceived vulnerability was associated with observers’ perceptions that conflict actions were mor-
ally justifiable. As the Arab-dominated United Nations continues to single out Israel, and anti-
Semitism continues to rise globally [44], knowledge of the historical victimization of Jews is
dissipating among younger generations in Europe and North America. For example, in the U.
S., 22% of millennials (aged 18–34) said they had never heard of, or were unsure whether they
had heard of, the Holocaust [45]. For better or worse, as observers’ understanding of the politi-
cal history and relationships of groups involved in intractable conflicts shift, so too will alle-
giances and expectations of behaviour, possibly resulting in political interventions that
contribute to historical repetition of victim persecution.
In conclusion, not surprisingly, for a host of reasons, it appears that nations in conflict vary
in the perceptions they elicit from citizens of an observer country. To the extent that the safety
and security of such nations is viewed to be at risk, their conflict actions are regarded as more
morally justified, and on the whole, nations’ power or strength to contend with threats to their
national security did not mitigate or enhance observers’ perceptions of the legitimacy of their
actions. Such an understanding might entice top dog nations to engage in victim narratives to
increase perceptions of their vulnerability. In actuality the present findings suggest that victim
narratives may be more critical to observers’ perceptions of less powerful nations in conflict,
whereas highlighting shared identity with allies may work more to the benefit of superpower
nations.
Supporting information
S1 File. Minimum data for Study 1. These data are in SPSS format.
(SAV)
Perceived justifiability of international conflict actions
PLOS ONE | https://doi.org/10.1371/journal.pone.0220303 July 29, 2019 17 / 20
S2 File. Minimum data for Study 2. These data are in SPSS format.
(SAV)
S3 File. Minimum data for Study 3. These data are in SPSS format.
(SAV)
Author Contributions
Conceptualization: Kimberly Matheson, Nyla Branscombe, Yechiel Klar, Hymie Anisman.
Formal analysis: Kimberly Matheson.
Funding acquisition: Kimberly Matheson.
Methodology: Kimberly Matheson, Nyla Branscombe, Hymie Anisman.
Project administration: Kimberly Matheson.
Resources: Kimberly Matheson.
Validation: Kimberly Matheson, Nyla Branscombe.
Writing original draft: Kimberly Matheson.
Writing review & editing: Nyla Branscombe, Yechiel Klar, Hymie Anisman.
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