And you can read it for free. The Authoritarians by Bob Altemeyer is not about leaders, it is about followers: the kind of people who are ready to follow the next dictator who comes along.
This short excerpt is from the introduction to the book.
Authoritarianism is something authoritarian followers and authoritarian leaders cook up between themselves. It happens when the followers submit too much to the leaders, trust them too much, and give them too much leeway to do whatever they want–which often is something undemocratic, tyrannical and brutal. In my day, authoritarian fascist and authoritarian communist dictatorships posed the biggest threats to democracies, and eventually lost to them in wars both hot and cold. But authoritarianism itself has not disappeared, and I’m going to present the case in this book that the greatest threat to American democracy today arises from a militant authoritarianism that has become a cancer upon the nation.
We know an awful lot about authoritarian followers. In one way or another, hundreds of social scientists have studied them since World War II. We have a pretty good idea of who they are, where they come from, and what makes them tick. By comparison, we know little about authoritarian leaders because we only recently started studying them. That may seem strange, but how hard is it to figure out why someone would like to have massive amounts of power? The psychological mystery has always been, why would someone prefer a dictatorship to freedom? So social scientists have focused on the followers, who are seen as the main, underlying problem.
Read this book. Buy a paperback copy and give it to someone.