As scholarly interest in the concept of identity continues to grow, social identities are proving to be crucially important for understanding contemporary life. Despite - or perhaps because of - the sprawl of different treatments of identity in the social sciences, the concept has remained too...

Prospect theory scholars have identified important human decision-making biases, but they have been conspicuously silent on the question of the origin of these biases. Here we create a model that shows preferences consistent with prospect theory may have an origin in evolutionary psychology....