Exodus: How Migration is Changing Our World

It is one of the most pressing and controversial questions of our time -- vehemently debated, steeped in ideology, profoundly divisive. Who should be allowed to immigrate and who not? What are the arguments for and against limiting the numbers? We are supposedly a nation of immigrants, and yet our policies reflect deep anxieties and the quirks of short-term self-interest, with effective legislation snagging on thousand-mile-long security fences and the question of how long and arduous the p...