It’s been said, especially among liberals, that facts have a well-known liberal bias. The same probably applies to knowledge itself, and the keepers of knowledge, the academics among our nation’s colleges and universities, self-identify as left of center; and the trend is increasing.
Paul Krugman discusses the phenomenon here.
But what’s really happening here? Did professors move left, or did the meaning of conservatism in America change in a way that drove scholars away? You can guess what I think. But here’s some evidence. First, using the DW-nominate measure — which uses roll-call votes over time to identify a left-right spectrum, and doesn’t impose any constraint of symmetry between the parties — what we’ve seen over the past generation is a sharp rightward (up in the figure) move by Republicans, with no comparable move by Democrats, especially in the North: