How many is too many? : the progressive argument for reducing immigration into the United States / Philip Cafaro.

From the stony streets of Boston to the rail lines of California, from General Relativity to Google, one of the surest truths of our history is the fact that America has been built by immigrants. The phrase itself has become a steadfast campaign line, a motto of optimism and good will, and indeed it is the rallying cry for progressives today who fight against tightening our borders. This is all well and good, Philip Cafaro thinks, for the America of the past—teeming with resources, opportunities, and wide open spaces—but America isn't as young as it used to be, and the fact of the matter is we can't afford to take in millions of people anymore. We've all heard this argument before, and one might think Cafaro is toeing the conservative line, but here's the thing: he's not conservative, not by a long shot. He's as progressive as they come, and it's progressives at whom he aims with this book's startling message: massive immigration simply isn't consistent with progressive ideals.