This is baffling. And also interesting. Turns out, about 20 percent of philosophy PhDs, grad students, and philosophers don't believe in any sort of external world outside of their own head. Given postmodernism, I don't know if that is better or worse than expected.
Also, this study found that almost 90 percent of professors are Democrats. Only 7 percent Republicans. And Libertarians almost unaccounted for.
http://philpapers.org/bbs/thread.pl?tId=417
Accept or lean toward: non-skeptical realism 760 / 931 (81.6%)Other 86 / 931 (9.2%)Accept or lean toward: skepticism 45 / 931 (4.8%)Accept or lean toward: idealism 40 / 931 (4.2%)with this result from my study of the political affiliations of American philosophy professors (based on the voter registration data of 375 philosophy professors in CA, FL, and NC):Democrat 87.2%Republican: 7.7%Green: 2.7%Independent: 1.3%Libertarian: 0.8%Peace&Freedom: 0.3%