The debate over immigration should be informed by better research on numbers, costs, and impacts. Yet, this will not, I believe, offer decisive guidance in the debate and will certainly not settle it. Passions and interests will and must come into play, but beyond passions and interests there will have to be moral choices. What are our obligations as a nation to the large numbers who wish to enter and make their lives here? These choices cannot be settled ultimately by a better understanding of how our racial and ethnic demography will ...