"Concern with birthright citizenship is probably misplaced," says Judge Richard Posner, "because the most serious problem of U.S. immigration policy is not who should be excluded but who should be admitted, and that problem should be tackled first. We are handicapping our growth by refusing to allow easy admission of those immigrants who are most likely to foster economic growth by virtue of their IQ, skills, or wealth. Instead we continue to emphasize lotteries and family-reuniting as the principal criteria of lawful immigration."