The study of personality and politics is possible and desirable, but systematic intellectual progress is possible only if there is careful attention to problems of evidence, inference, and conceptualization. This essay reviews such problems, setting forth a conceptualization that takes account of, and builds on, many of the recurring reservations that are advanced about the utility of studying the personalities of political actors. In doing do, it takes selective account of the classical literature on political psychology and more recent developments in the field.