... Its centrality in the formation and maintenance of social bonds is implicated in its phylogenic history: Empathy is thought to have evolved out of the mammalian caregiving system to promote adaptive responses to the needs of kin, as well as to promote cooperation and resource sharing among group members (de Waal, 2008(de Waal, , 2012Decety, Norman, Berntson, & Cacioppo, 2012;MacLean, 1985;Preston, 2013;Preston & de Waal, 2002;Taylor, 2002). Indeed, research in primates (Clay & de Waal, 2013;de Waal, 2008de Waal, , 2012, rodents (Bartal, Decety, & Mason, 2011;Bartal, Rodgers, Sarria, Decety, & Mason, 2014;Mogil, 2012;Panksepp & Lahvis, 2011), and other mammals (e.g., Custance & Mayer, 2012) suggests that the capacity to understand others' intentions and to resonate with others' emotions underlies social interaction in a variety of animal species (Panksepp & Panksepp, 2013). In humans, this faculty has expanded beyond the immediate circle of one's kinship group, allowing us to care for the well-being of strangers, out-group members, and even those we never encounter in person; stories of earthquake victims and displaced refugees move us, even in the absence of a face-to-face encounter (Stone, 2006 Although the broad capacity to empathize is considered nearly universal, individual differences in the ability and tendency to do so have significant implications for social functioning across development (Eisenberg, 2000;Eisenberg, Spinrad, & Knafo-Noam, 2015). ...