Do acts of kindness improve the well-being of the actor? Recent advances in the
behavioural sciences have provided a number of explanations of human social, cooperative …

Many researchers assume that until 10–12,000 years ago, humans lived in small, mobile,
relatively egalitarian bands. This “nomadic-egalitarian model” suffuses the social sciences. It …

A scientist integrates evolutionary biology, genetics, psychology, economics, and more to
explore the development and workings of human societies.“There is no good reason why …

A fundamental puzzle of human evolution is how we evolved to cooperate with genetically
unrelated strangers in transient interactions. Group-level selection on culturally differentiated …

Modern humans live in an “exploded” network with unusually large circles of trust that form
due to prosociality toward unfamiliar people (ie xenophilia). In a set of experiments we …

Third-party intervention, such as when a crowd stops a mugger, is common. Yet it seems
irrational because it has real costs but may provide no personal benefits. In a laboratory …

Research over the last fifty years has suggested that political attitudes and values around
the globe are shaped by two ideological dimensions, often referred to as economic and …

THE EMERGENCE OF EVOLUTIONARY PSYCHOLOGY: WHAT IS AT STAKE?
understanding the design of the human mind and brain, as Darwin himself was the first to …

Highlights•Welfare tradeoffs involve sacrificing personal welfare to increase another's
welfare.•Although making welfare tradeoffs feels easy, this hides complex computations.• …

Humans regularly intervene in others' conflicts as third-parties. This has been studied using
the third-party punishment game: A third-party can pay a cost to punish another player (the …