Net migration of Mexicans to the United States peaked in the early 2000s and it has been negative for twelve of the thirteen years since 2008. Just as industrialization and urbanization pushed down birth rates in the developed world, the same process has begun in Mexico, just a few decades later. Today’s Mexican demographic structure suggests it will never again be a net large-scale contributor to American migration. Most of the big migrant flows into the United States since 2014 have instead been from the near-failed Central American states of Honduras, El Salvador, and Guatemala.