I've just discovered Barbara Oakley, an engineering Ph.D., who writes a blog on the Psychology Today site. She asks, why are most journalists are Democrats? This is a big subject, but her answer begins with the fact that most journalist want to help people, or better the world. They are self-selected; we are not talking about random selection here. If you don't want to help people, you must be interested in money, and therefore greedy.

As college students, they tend to take a lot of courses in history, psychology, sociology, and political science. Sociology is totally focused on, guess what, inequality. For the most part, these courses are taught by Democrats, who stress that corporations are the bad guys, and that society can be improved only by unions and government programs, especially ones that lean toward socialistic solutions. So everybody -- students, teachers, and later editors -- have a certain mind-set, and everybody buys into it. Often they can't see anything else, and denigrate or even demonize anyone who dares question them.

Oakley also makes this interesting point: It's easy for journalists to find targets for investigation in open, capitalistic societies, since "totalitarian governments are journalistic black holes."