Today on MindMatters we interview Thomas Costello, Emory University PhD candidate and lead author of a groundbreaking new study on leftwing authoritarianism. Long thought by social psychologists to be the exclusive of social conservatives (RWA), studies of authoritarianism on the left have been few and far between. Until now. Despite the almost willful ignorance about the subject in the field, LWA really does exist, and Costello and colleagues are clarifying its structure as a valid construct. It turns out that rightwing and leftwing authoritarians have a lot in common - and some differences too. Join us as we pick Tom's brain about the history of the study of authoritarianism, how it became associated exclusively with conservatism, and what the latest studies are revealing about authoritarians on the left: those anti-conventionalists who channel their aggression against existing hierarchies and favor top-down censorship, and who are more willing to participate in political violence than their peers.