Interesting — and I think perceptive — column by Tyler Cowen:

Imagine the perfect political and intellectual weapon. It would disable your adversaries by preoccupying them with their own vanities and squabbles, a bit like a drug so good that users focus on the high and stop everything else they are doing.

Such a weapon exists: It is called political correctness. But it is not a weapon against white men or conservatives, as is frequently alleged; rather, it is a weapon against the American left. To put it simply, the American left has been hacked, and it is now running in a circle of its own choosing, rather than focusing on electoral victories or policy effectiveness. Too many segments of the Democratic Party are self-righteously talking about identity politics, and they are letting other priorities slip.