Gerry Mulhern, Judith Wylie
Changing levels of numeracy and other core mathematical skills among psychology undergraduates between 1992 and 2002
British journal of psychology (London, England : 1953)
largescale societies strangers regularly engage mutually beneficial transactions puzzling evolutionary mechanisms associated kinship reciprocity underpin much primate sociality readily extend large unrelated groups theory suggests evolution societies may required norms institutions sustain fairness ephemeral exchanges true engagement largerscale institutions markets world religions associated greater fairness larger communities punish unfairness using three behavioral experiments administered across 15 diverse populations show market integration measured percentage purchased calories positively covaries fairness community size positively covaries punishment participation world religion associated fairness although across measures results suggest modern prosociality solely product innate psychology also reflects norms institutions emerged course human history