Opportunities: Share resources, receive material support, enhanced self-protection, access to mates
Moderating individual differences
Coalitional identity or investment; gender;“collectivistic” cultural context andproximity to kin networks; dispositionaltrust in others; need for belongingnessand/or social approval
Proximate triggers
Familiarity; past acts of reciprocity, trustworthiness;others’ adherence to group norms; facialcharacteristics signaling trustworthiness