The Stone Soup Experiment is a remarkable story of cultural difference, of in-groups, out-groups, and how quickly and strongly the lines between them are drawn. It is also a story about simulation and reality, and how quickly the lines between them can be dismantled. In a compulsively readable account, Deborah Downing Wilson details a ten-week project in which forty university students were split into two different simulated cultures: the carefree Stoners, and the market-driven Traders. Through their eyes we are granted intimate access to the very foundations of human society: how group identities are formed and what happens when opposing ones come into contact.