What do geopolitical conflict, collective bargaining, and team collaboration have in common? All three illustrate the ubiquitousness of cooperation in human social life. The central goal of my research program is to understand the social cognitive abilities that allow our species to cooperate so successfully. To do this, I conduct behavioral experiments with adults and children to better understand how these social-cognitive processes emerge in ontogeny and come to underlie cooperative behavior. Below I detail my the three main areas of my research program.