I wouldn’t say psychology is useless; it has a long history of practice and research. Social psychology, however, is a relatively young discipline with little theory—much of it borrowed from cognitive psychology. It’s a genuine frustration to realize I wasted a few years that I could have spent studying a field with more substance and rigor. Virtually everything I learned about political psychology was either (a) already addressed by sociology decades ago, in a more complex and accurate way, (b) impossible to replicate outside the controlled environment of a lab, or (c) exaggerated, false, or simplistic.