An argument for diversity; I thought this was the most interesting part:
. . . when scholars cluster on the left end of the spectrum, they marginalize themselves. We desperately need academics like sociologists and anthropologists influencing American public policy on issues like poverty, yet when they are in an outer-left orbit, their wisdom often goes untapped.
In contrast, economists remain influential. I wonder if that isn’t partly because there is a critical mass of Republican economists who battle the Democratic economists and thus tether the discipline to the American mainstream.