Why do democracies win wars? This is a critical question in the study of international relations, as a traditional view--expressed most famously by Alexis de Tocqueville--has been that democracies are inferior in crafting foreign policy and fighting wars. In Democracies at War , the first major study of its kind, Dan Reiter and Allan Stam come to a very different conclusion. Democracies tend to win the wars they fight--specifically, about eighty percent...