"America's current immigration policy is a vast social experiment... It involves two gambles. First, we are betting that rapid population growth will have no significant adverse effect on the quality of our descendants' lives. Second, we are betting that we can admit millions of unskilled immigrants to do our dirty work without creating a second generation whose members will have the same problems as the children of the American-born workers who do such jobs.

"The United States may be able to double its population without lowering the quality of its citizens' lives, but the odds of its doing so would surely be better if it proceeded more slowly."

-- "Who Should Get In?" New York Review of Books, December 20, 2001