Regular readers may have already inferred that I am fascinated by demographics. So I enjoyed this piece at by Arthur C. Brooks, who uses survey data to show that conservatives have more babies than liberals. He presses the statistics, moreover, into the service of demonstrating that the trend bodes ill for Democratic Party political success.

According to the 2004 General Social Survey, if you picked 100 unrelated politically liberal adults at random, you would find that they had, between them, 147 children. If you picked 100 conservatives, you would find 208 kids.