In fact, few other professional spheres are as strongly skewed to the right as academia is to the left; when I looked into this a few years ago, the only professional group I could find with a similar rightward skew was Southern Baptist ministers, a comparison that neither group probably finds very flattering. Military officers are weakly conservative (two-thirds to one-third), but the enlisted are less so, and whether your business skews Democratic or Republican varies by industry and job description. Professors really do stand out as extremely politically concentrated on the left in a way that few other groups are, especially in areas like social psychology.
As Jonathan Haidt and the good folks at Heterodox Academy have argued, this makes it too easy for the group to adopt weak theories that flatter consensus beliefs without giving them the rigorous interrogation they’d get from a more balanced profession.
There’s another harm: The leftward skew disconnects academia from the society that it is supposed to serve. The bitter culture wars we’ve been living through, and the increasingly nasty partisanship, are the signs of a society whose factions no longer know how to talk to one another.