Still true: Migration eases global poverty.

Matthew Yglesias:

Many people purport to be saddened by the fact that so many people live in countries that are poor, tyrannical, or otherwise malgoverned. And rightly so. But relatively few seem willing to acknowledge that one of the simplest and most effective means at our disposal for addressing these concerns is to make it easier for the residents of such countries to move to richer and better-governed places.