By Donna R. Gabaccia, Rudolph J. Vecoli Professor of Immigration History and Director of the Immigration History Research Center at the University of Minnesota
Human beings continue to act like human beings--to fall in love, marry, have babies, and want to preserve family ties--even as they migrate across national boundaries. Their completely normal choices pose fundamental
challenges to common assumptions about citizenship. They complicate the already-complex politics of devising and implementing immigration policies.