Heat does not reduce prosociality
High temperatures have long been empirically linked to violence, conflict, and aggression at the societal level—a troubling pattern in a warming world. Alessandra Cassar and colleagues sought to explore the effect of high heat on individual egalitarianism, resource maximization, selfishness, spite, and competitiveness. The authors invited university students in Colombia, India, Kenya, Mexico, and the United States to play games that involved making choices about whether to share, whether to reduce another player’s payoff at a cost to oneself, as well as whether or not to compete. ...