I can't find it since I'm at work right now but Jonathan Haidt has some great work on this. Liberal group think is present, but only really dominates the social

I can't find it since I'm at work right now but Jonathan Haidt has some great work on this. Liberal group think is present, but only really dominates the social sciences/humanities. But in these fields liberal group think has increasingly dominated since 2000. He has some stuff on departments going from 3:1 liberal:conservative to more like 10:1.