“…We often favor members of our own group over those from other groups (ie, ingroup favoritism; Tajfel et al, 1971;Arrow, 2007). Recent research has revealed that oxytocin, a neuropeptide that facilitates social affiliation and social cognition (Kosfeld et al, 2005;Bartz and Hollander, 2006;Bartz et al, 2010Bartz et al, , 2011a, motivates ingroup favoritism in social behavior (De Dreu, 2012;van IJzendoorn and Bakermans-Kranenburg, 2012). Intranasal administration of oxytocin (compared with placebo) enhanced ingroup favoritism in social trust (van IJzendoorn and BakermansKranenburg, 2012), empathy for pain (Sheng et al, 2013), and cooperation (De Dreu et al, 2010, 2011De Dreu, 2012).…”