Christopher Dawes

• New York University

Previous research has found that political traits have some degree of genetic basis, but researchers have had less success unpacking the relationship between genes and political behavior. We propose an approach for examining this relationship that can overcome many of the limitations of previous research: polygenic indices (PGIs). PGIs are DNA-base...

By most accounts, an important prerequisite for a well-functioning democracy is engaged citizens. A very prominent explanation of variation in political engagement suggests that parental transmission through socialization accounts for individual-level differences in political engagement. In this paper, we show, using a large Danish twin survey ( N...

While previous studies have shown that the traits in the FFM are moderately heritable, it is important to examine whether earlier results hold across different contexts. To date, few studies from the Scandinavian context have estimated the heritability of the FFM. We remedy this shortcoming by making use of a large sample of Danish twins who comple...

There is a growing interest in how social conditions moderate genetic influences on education [gene-environment interactions (GxE)]. Previous research has focused on the family, specifically parents' social background, and has neglected the institutional environment. To assess the impact of macro-level influences , we compare genetic influences on...

Significance The strong correlation between education and voting is among the most robust findings in social science. We show that genes associated with the propensity to acquire education are also associated with higher voter turnout. A within-family analysis suggests education-linked genes exert direct effects on voter turnout but also reveals ev...

Some constitutional scholars suggest that the US Constitution stands as one of the oldest yet least changed national constitutions in part because Americans’ tendency to “revere” the Constitution has left them unwilling to consider significant changes to the document. Several recent studies support aspects of this claim, but no study establishes a...

Many studies have shown that there is a positive relationship between education and political knowledge. However, some scholars have recently challenged this idea, arguing that the positive correlation between education and knowledge may disappear once confounding variables are considered. In this paper, we replicate a recent study that used the di...

By most accounts, an important prerequisite for a well-functioning democracy is engaged citizens. A very prominentexplanation of variation in political engagement suggests that parental transmission through socialization accountsfor individual-level differences in political engagement. In this paper, we show that classic formulations of parentaltra...

Many studies have shown that political efficacy, interest in politics, and political knowledge are strongly related to political participation. In most analyses, these variables are described as having a causal effect on participation. In this paper, we examine the extent to which the relationship between political attitudes and participation is co...

This article examines the effect of high school civic education on voter turnout in adulthood by integrating extensive academic transcript data on social studies and civic coursework into a large-scale, longitudinal survey of a nationally representative sample of adolescents. In an initial series of regression models, civics courses appear to have...

Scholars have long been interested in the underpinnings of political ideology. Over the past fifteen years or so, political scientists, psychologists, sociologists, and economists have started to take seriously the idea that ideology might be influenced by genes. In this article, we review the literature on the genetics of ideology. We begin by des...

Previous studies have stressed the role of a child's family environment for future political participation. This field of research has, however, overlooked that children within the same family have different experiences depending on their birth order. First-borns spend their first years of life without having to compete over their parents' attentio...

We examined the association between intelligence, party identification, and political orientations using genetically informative data gathered from German twins and their families (n = 9553 individuals including 1524 adolescent and young-adult twin pairs). The results indicated that supporters of the Pirate Party and the Green Party had levels of i...

Why do some people feel a strong sense of civic duty to vote while others feel no obligation at all? One factor that has been identified as an important antecedent of the sense of civic duty is education. In The American Voter, Campbell, Converse, Miller, & Stokes (1960) note that the sense of civic duty appears to “depend substantially on educatio...

To reduce transmission of COVID-19, public officials must help their communities resolve a series of novel social dilemmas. For instance, when social distancing becomes widespread, the likelihood of COVID-19 exposure decreases, thus tempting individuals to leave their homes while others stay sheltered. Yet, if all indulge that temptation, then rate...

Existing research shows that ideological orientations are stable after young adulthood. Extending research on the sources of ideological stability, we examine social and economic ideology over a 3- to 4-year period in two twin panels (one Danish and one American). We find evidence for the importance of genetic influences and individual life experie...

Scholars have documented the failed randomization in 1969’s inaugural Vietnam Selective Service Lottery, but the story of how statisticians fixed that problem remains untold. Here, as the 50th anniversary of these events approaches, we recount how John W. Tukey, a team of statistical luminaries, and a graduate student from the University of Chicago...

Objective Research on political socialization has shown that political and civic experiences during high school can impact later political engagement. However, political scientists are increasingly realizing that nonpolitical experiences, dispositions, and attributes in childhood and adolescence can play a role in shaping political participation. B...

We examine the role of moral foundations and system justification in explaining support for Donald Trump in the 2016 general election using data from the 2016 Cooperative Congressional Election Survey. A number of important findings emerge. First, we find that there are important partisan and ideological differences when it comes to moral foundatio...

We investigate the link between genes, psychological traits, and political engagement using a new data set containing information on a large sample of young German twins. The TwinLife Study enables us to examine the predominant model of personality, the Big Five framework, as well as traits that fall outside the Big Five, such as cognitive ability,...

Political scientists have long been interested in the determinants of political knowledge. In many studies, education is the strongest predictor of political knowledge. However, some studies have found that education has no effect on knowledge once confounding variables are taken into account. In addition, some recent work suggests that education r...

In this paper, we investigate the genetic and psychological underpinnings of generalized social trust, an orientation that refers to one's expectations about the trustworthiness of strangers. We make a number of contributions to the literature. First, using a new dataset containing information on a large sample of German twin pairs (N = 1980 pairs)...

[This corrects the article DOI: 10.1371/journal.pone.0194541.].

The propensity of a trait to vary within a population may have evolutionary, ecological, or clinical significance. In the present study we deploy sibling models to offer a novel and unbiased way to ascertain loci associated with the extent to which phenotypes vary (variance-controlling quantitative trait loci, or vQTLs). Previous methods for vQTL-m...

Fig A, Estimated coefficients on SNPs for simulated dependent variable with no effects and confounding between a family-level indicator, genotype, and outcome. The red dashed line represents the true snp level effect (β = 0), while the density curves show the range of estimated β^ for each of the models. We see the fixed effects model correctly cen...

The propensity of a trait to vary within a population may have evolutionary, ecological, or clinical significance. In the present study we deploy sibling models to offer a novel and unbiased way to ascertain loci associated with the extent to which phenotypes vary (variance-controlling quantitative trait loci, or vQTLs). Previous methods for vQTL-m...

Centralized sanctioning institutions cultivate cooperation by eradicating the gains from free-riding. Studies show that electing a community member to operate a centralized sanctioning institution further increases support for the public good. These studies have overlooked an all-too-common attribute of non-laboratory elections: political inequalit...

What motivates citizens to run for office? Recent work has shown that early life parental socialization is strongly associated with a desire to run for office. However, parents not only shape their children’s political environment, they also pass along their genes to those same children. A growing area of research has shown that individual differen...

Studies suggest the existence of an association between the physical formidability of human males and their level of aggression. This association is theoretically predictable from animal models of conflict behavior but could emerge from multiple different causal pathways. Previous studies have not been able to tease apart these paths, as they have...

Political scientists have long known that the sense of civic duty is one of the strongest predictors of individual voter turnout, yet scholars are only just starting to study and understand the origins of this orientation. Recent genopolitics research has indicated that the sense of civic duty is heritable, and recent research in political psycholo...

Previous research has reported correlations between the military service records of parents and their children. Those studies, however, have not determined whether a parent’s military service causally influences an offspring’s participation in the armed forces. To investigate the possibility of a causal relationship, we examined whether lottery num...

Political interest is one of the strongest predictors of individual political engagement, but little is known about the origins of this political orientation. The goal of this paper is to clarify the role that biological and psychological factors play in the formation of political interest. A series of recent studies in genetics have illustrated th...

Myriad studies show that politically-salient events influence civic and political engagement. Yet, on the other hand, decades of research indicate that familial factors mold political and civic dispositions early in life, before an individual experiences political events outside the family. Viewing these two lines of research together, we ask if in...

Recent genopolitics and political psychology research suggests individuals' biological differences influence political participation. The interaction between individual differences and environments has received less attention, not least because of the confound of self-selection into environments. To test the interaction between innate predispositio...

Some observers argue that excessive veneration of the U.S. Constitution has blinded Americans to its flaws and made them reluctant to consider necessary reforms. In this paper, we test the assumptions that underlie these claims. We report the results of two survey experiments that examine the existence and effects of constitutional status quo bias...

In this study we provide new evidence on the much-discussed effect of education on political participation by utilizing the quasi-experiment of twinning. By looking at the relationship between education and participation within monozygotic (MZ) twin pairs we are able to circumvent traditional sources of confounding of the relationship rooted in gen...

Over the years, many suggestions have been made on how to reduce the importance of family background in political recruitment. In this study, we examine the effectiveness of one such proposal: the expansion of mass education. We utilize a difference-in-difference strategy to analyze how a large school reform launched in Sweden in the 1950s, which l...

One of the clearest results in previous studies on social trust is the robust positive relationship with educational attainment. The most common interpretation is that education has a causal effect on social trust. The theoretical argument and empirical results in this article suggest a different interpretation. We argue that common preadult factor...

For close to a century, the social and biological sciences have treated the role of biology and genetics in the explanation of human behavior in different ways; while the social sciences have tended to privilege ‘nurture’ as the cause for variations, biological sciences have leaned toward foregrounding ‘nature.’ Increasingly, scholars in both field...

Civic engagement is a classic example of a collective action problem: while civic participation improves life in the community as a whole, it is individually costly and thus there is an incentive to free ride on the actions of others. Yet, we observe significant inter-individual variation in the degree to which people are in fact civically engaged....

Parental education is the strongest measured predictor of offspring education, and thus many scholars see the parent–child correlation in educational attainment as an important measure of social mobility. But if social changes or policy interventions are going to have dynastic effects, we need to know what accounts for this intergenerational associ...

A recent genome-wide-association study of educational attainment identified three single-nucleotide polymorphisms (SNPs) whose associations, despite their small effect sizes (each R(2) ≈ 0.02%), reached genome-wide significance (p < 5 × 10(-8)) in a large discovery sample and were replicated in an independent sample (p < .05). The study also report...

Recent research has demonstrated that genetic differences explain a sizeable fraction of the variance in political orientations, but little is known about the pathways through which genes might affect political preferences. In this article, we use a uniquely assembled dataset of almost 1,000 Swedish male twin pairs containing detailed information o...

Recent research demonstrates that a wide range of political attitudes, beliefs, and behaviors can be explained in part by genetic variation. However, these studies have not yet identified the mechanisms that generate such a relationship. Some scholars have speculated that psychological traits mediate the relationship between genes and political par...

Almost 40 years ago, evidence from large studies of adult twins and their relatives suggested that between 30 and 60 % of the variance in social and political attitudes could be explained by genetic influences. However, these findings have not been widely accepted or incorporated into the dominant paradigms that explain the etiology of political id...

Previous research on the acceptability of dishonest actions has focused on the role of social norms and internal reward mechanisms. Using a sample of over 2,000 Swedish adult twins, this manuscript examines whether there exists another source that is driving differences in perceptions of the acceptability of dishonest actions: genetic variation. We...

Classically derived estimates of heritability from twin models have been plagued by the possibility of genetic-environmental covariance. Survey questions that attempt to measure directly the extent to which more genetically similar kin (such as monozygotic twins) also share more similar environmental conditions represent poor attempts to gauge a co...

The American Political Science Review recently published a critique of an article we published in the Journal of Politics in 2008. In that article we showed that variants of the genes 5HTT and MAOA were significantly associated with voter turnout in a sample of 2,300 subjects from the National Longitudinal Study of Adolescent Health. Here, we addre...

Liberals and conservatives exhibit different cognitive styles and converging lines of evidence suggest that biology influences differences in their political attitudes and beliefs. In particular, a recent study of young adults suggests that liberals and conservatives have significantly different brain structure, with liberals showing increased gray...

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We address leadership emergence and the possibility that there is a partially innate predisposition to occupy a leadership role. Employing twin design methods on data from the National Longitudinal Study of Adolescent Health, we estimate the heritability of leadership role occupancy at 24%. Twin studies do not point to specific genes or neurologica...

We address leadership emergence and the possibility that there is a partially innate predisposition to occupy a leadership role. Employing twin design methods on data from the National Longitudinal Study of Adolescent Health, we estimate the heritability of leadership role occupancy at 24%. Twin studies do not point to specific genes or neurologica...

We test whether generosity is related to political preferences and partisanship in Canada, Sweden, the United Kingdom and the United States using incentivized dictator games. The total sample consists of more than 5,000 respondents. We document that support for social spending and redistribution is positively correlated with generosity in all four...

Preferences are fundamental building blocks in all models of economic and political behavior. We study a new sample of comprehensively genotyped subjects with data on economic and political preferences and educational attainment. We use dense single nucleotide polymorphism (SNP) data to estimate the proportion of variation in these traits explained...

Individuals are willing to sacrifice their own resources to promote equality in groups. These costly choices promote equality and are associated with behavior that supports cooperation in humans, but little is known about the brain processes involved. We use functional MRI to study egalitarian preferences based on behavior observed in the “random i...

Recent studies have shown that trusting attitudes and behavior are biologically influenced. Focusing on the classic trust game, it has been demonstrated that oxytocin increases trust and that humans are endowed with genetic variation that influences their behavior in the game. Moreover, several studies have shown that a large share of the variation...

Attitudes towards foreign policy have typically been explained by ideological and demographic factors. We approach this study from a different perspective and ex amine the extent to which foreign policy preferences correspond to genetic variation. Using data from the Minnesota Twin Family Study, we show that a moderate share of individual differenc...

Objectives The impact of political efficacy on political participation has been established in numerous classical studies of political behavior. However, the effects of more general measures of efficacy on political efficacy and voter turnout have received almost no attention. Additionally, seemingly independent contemporary developments in the fie...

The two most important questions in political science are: (1) How do we organize ourselves to do more than we could on our own? (2) How do we distribute the fruits of our collective labor? This chapter argues that the answers to these questions can be better understood by considering models of early cooperation in premodern times. It shows that th...

Models of political participation have begun to incorporate actors who possess “social preferences.” However, these models have failed to take into account the potentially incongruent political goals of different social preference types. These goals are likely to play an important role in shaping political behavior. To examine the effect of distinc...

There has been growing interest in the use of genetic models to expand the understanding of political preferences, attitudes, and behaviors. Researchers in the social sciences have begun incorporating these models and have revealed that genetic differences account for individual differences in political beliefs, behaviors, and responses to the poli...

Scholars in many fields have long noted the importance of social context in the development of political ideology. Recent work suggests that political ideology also has a heritable component, but no specific gene variant or combination of variants associated with political ideology have so far been identified. Here, we hypothesize that individuals...

Laboratory experiments indicate that many people willingly contribute to public goods and punish free riders at a personal cost. We hypothesize that these individuals, called strong reciprocators, allow political parties to overcome collective action problems, thereby allowing those organizations to compete for scarce resources and to produce publi...

Oxytocin (OXT) has been implicated in a suite of complex social behaviors including observed choices in economic laboratory experiments. However, actual studies of associations between oxytocin receptor (OXTR) gene variants and experimentally elicited social preferences are rare. We test hypotheses of associations between social preferences, as mea...

Political scientists have recently explored the genetic basis of political participation. Fowler, Baker & Dawes (2008) recently showed in two independent samples of twins that voter turnout is heritable and Fowler & Dawes (2008) identified two specific genes associated with turnout. Earlier work (Fowler & Kam 2006) has demonstrated a link between p...

We summarize the findings from a research program studying the heritability of behavior in a number of widely used economic games, including trust, dictator, and ultimatum games. Results from the standard behavior genetic variance decomposition suggest that strategies and fundamental economic preference parameters are moderately heritable, with est...

In this paper, we use the classical twin design to provide estimates of genetic and environmental influences on experimentally elicited preferences for risk and giving. Using standardmethods from behavior genetics, we find strong prima facie evidence that these preferences are broadly heritable and our estimates suggest that genetic differences exp...

We conduct experiments in which subjects participate in both a game that measures preferences for income equality and a public goods game involving costly punishment. The results indicate that individuals who care about equality are those who are most willing to punish free-riders in public goods games.

Social networks exhibit strikingly systematic patterns across a wide range of human contexts. Although genetic variation accounts for a significant portion of the variation in many complex social behaviors, the heritability of egocentric social network attributes is unknown. Here, we show that 3 of these attributes (in-degree, transitivity, and cen...

We matched public voter records to 54 subjects who performed a risk-taking task during functional imaging. We find that Democrats and Republicans had significantly different patterns of brain activation during processing of risky decisions. Amygdala activations, associated with externally directed reactions to risk, are stronger in Republicans, whi...

Previous studies have found that both political orientations (Alford, Funk & Hibbing 2005) and voting behavior (Fowler, Baker & Dawes 2007, Fowler & Dawes 2007) are significantly heritable. In this article we study genetic variation in another important political behavior: partisan attachment. Using the National Longitudinal Study of Adolescent Hea...

Social networks exhibit strikingly systematic patterns across a wide range of human contexts. While genetic variation accounts for a significant portion of the variation in many complex social behaviors, the heritability of egocentric social network attributes is unknown. Here we show that three of these attributes (in-degree, transitivity, and cen...

Fowler, Baker, and Dawes (2008) recently showed in two independent studies of twins that voter turnout has very high heritability. Here we investigate two specific genes that may contribute to variation in voting behavior. Using data from the National Longitudinal Study of Adolescent Health, we show that individuals with a polymorphism of the MAOA...

The decision to vote has puzzled scholars for decades. Theoretical models predict little or no variation in participation in large population elections and empirical models have typically explained only a relatively small portion of individual-level variance in turnout behavior. However, these models have not considered the hypothesis that part of...

One of the strongest regularities in the empirical political science literature is the well-known correlation in parent and child partisan behavior. Until recently this phenomenon was thought to result solely from parental socialization, but new evidence on genetic sources of behavior suggests it might also be due to heritability. In this article w...

Although laboratory experiments document cooperative behavior in humans, little is known about the extent to which individual differences in cooperativeness result from genetic and environmental variation. In this article, we report the results of two independently conceived and executed studies of monozygotic and dizygotic twins, one in Sweden and...

Studies of identical and fraternal twins suggest that political ideology has a heritable component (Alford, Funk, and Hibbing 2005; Hatemi et al. 2007), but no specific gene associated with political ideology has so far been identified. Using data from the National Longitudinal Study of Adolescent Health, we investigate the moderating influence of...

Fowler, Baker, and Dawes (2008) recently showed in two independent studies of twins that voter turnout has very high heritability. Here we investigate two specific genes that may contribute to this heritability via their impact on neurochemical processes that influence social behavior. Using data from the National Longitudinal Study of Adolescent H...

Participants in laboratory games are often willing to alter others' incomes at a cost to themselves, and this behaviour has the effect of promoting cooperation. What motivates this action is unclear: punishment and reward aimed at promoting cooperation cannot be distinguished from attempts to produce equality. To understand costly taking and costly...

Models of political participation have begun to incorporate actors who possess “social preferences.” However, these models have failed to take into account the potentially incongruent political goals of different social preference types. These goals are likely to play an important role in shaping political behavior. To examine the effect of distinc...

Cooperation has been a focus of intense interest in the biological and social sciences. Yet in spite of a tremendous effort to develop evolutionary models and laboratory experiments that explain the existence of cooperation in humans, relatively little effort has been invested in documenting the prevalence of largescale cooperation in well-mixed po...

The decision to vote has puzzled scholars for decades. Theoretical models predict little or no participation in large population elections and empirical models have typically explained only a relatively small portion of individual-level variance in turnout behavior. However, these models have not considered the influence of genetic variation on vot...