Three laboratory studies investigate the hypothesis that the presence of wealth may influence people's propensity to engage in unethical behavior. In the experiments, participants are given the opportunity to cheat by overstating their performance or by stealing money. In each study, one group...

Long-established rituals in pre-existing cultural groups have been linked to the cultural evolution of group cooperation. Here we test the prediction that novel rituals – arbitrary hand and body gestures enacted in a stereotypical and repeated fashion – can impact intergroup bias in newly...