Here’s an interesting paper co-authored by Jonathan Haidt. Also, here is a good accompanying article in The New Yorker. The problem though with all the discussion is that the terms “conservative” and “liberal” and their supposed practical politics correlates “Republican” and “Democrat” are meaningless. When push comes to shove, self-ascribed or pejorative usage of these terms, flounder. People invoke these labels as if necessary and sufficient conditions can be specified, oblivious to what Michael Freeden called ideological morphology, something Percy understood. As I repeatedly say, epistemology not ideology.