But the United States ran an open borders regime throughout the 19th century and we weren’t worse off for it. On the contrary, it laid the foundations for American greatness. Shifting back in that direction—with exceptions for dangerous criminals and other select problem types—over time seems perfectly feasible to me and would substantially increase overall human welfare. Now obviously that doesn’t resolve the question of whether or not, morally speaking, it makes sense to simply not care about the interests of foreigners. But Kaus and I agree that foreign-born people are people, so for my part I’d like to take their interests into consideration.
— What Would Happen If We Let All The Immigrants In — Yglesias argues, rightly, that discussion of U.S. immigration policy should not disregard the interests of those who don’t happen to be born in the U.S.