By defining political economy and war in the broadest sense, this unique Handbook brings together a wide range of interdisciplinary scholars from economics, political science, sociology, and policy studies to address a multitude of important topics. These include an analysis of why wars begin,...

Monoamine oxidase A gene (MAOA) has earned the nickname ‘warrior gene’ because it has been linked to aggression in observational and survey-based studies. However, no experiments have tested whether the ‘warrior gene’ actually drives behavioral manifestations of these tendencies,...