Why are so many professors tagged as liberals?

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Why Are Professors Liberal

http://www.nytimes.com/2010/01/18/arts/18liberal.html

The overwhelmingly liberal tilt of university professors has been explained by everything from outright bias to higher I.Q. scores. Now new research suggests that critics may have been asking the wrong question. Instead of looking at why most professors are liberal, they should ask why so many liberals — and so few conservatives — want to be professors.

The academic profession “has acquired such a strong reputation for liberalism and secularism that over the last 35 years few politically or religiously conservative students, but many liberal and secular ones, have formed the aspiration to become professors,”

“Why Are Professors Liberal?” That is especially true of their own field, sociology, which has become associated with “the study of race, class and gender inequality — a set of concerns especially important to liberals.”