:pushpin: "When people's personal and social identities become fused—when the boundary between self and group blurs—they become more willing to fight or die for their group (Gómez et al., 2011; Swann et al., 2012, 2014a, b). Many patriotic individuals, for example, define themselves by their national identities (Staub, 1997a, 2005a). And many people at loose ends find identity in their associations with new religious movements, self-help groups, or fraternal clubs."
"The more important our social identity and the more strongly attached we feel to a group, the more we react prejudicially to threats from another group (Crocker & Luhtanen, 1990; Hinkle et al., 1992)."