John Fund points out (no surprise to any one who has spent any time on an American campus) that there are various studies out showing the lack of intellectual diversity on university campuses, whose faculties are overwhelmingly Liberal. Here is one study (of Berkely and Stanford faculties) he mentions from Santa Clara University (PDF file, 34 pages). This study shows that Democratic professors outnumber Republicans 3 to 1 in eceonomics, 28 to 1 in sociology, and 30 to 1 in anthropology.
"For Stanford, we found an overall Democrat to Republican ratio of 7.6 to 1. For UC-Berkeley, we found an overall D to R ratio of 9.9 to 1. Moreover, the breakdown by faculty rank shows that Republicans are an endangered species on the two campuses."