I have a working familiarity with the social science literature on immigration. (In the past I have written articles for economic history and demography journals that dealt with various aspects of immigration in the late nineteenth and early twentieth centuries.) More to the point for present purposes, I have considerable personal experience with Mexicans. I grew up on the rural west side of California's San Joaquin Valley in the 1950s in a place with a population composed of about two-thirds Mexicans and their native-born children. In October 2015, I emigrated from the USA, and since then I have liv