Unlike that of most physical and natural scientists, the ability of social scientists to conduct experiments or rely on high-quality data is often limited. In my field, international relations, even the most robust econometric analyses often explain a pathetically small amount of the data’s statistical variance. Indeed, from my first exposure to the philosopher of mathematics Imre Lakatos, I was taught that the goal of social science is falsification. By proving an existing theory wrong, we refine our understanding of what our models can and cannot explain. –Daniel W. Drezner, The Chronicle of Higher Education.