The question "Can the United States still afford to be a nation of immigrants?" implies a premise: that historically the United States has well afforded to be a nation of immigrants - indeed, has benefited handsomely from its good fortune as an immigrant destination. That proposition was once so deeply embedded in our national mythology as to be axiomatic. More than a century ago, for example, in the proclamation that made Thanksgiving Day a national holiday, Abraham Lincoln gave thanks to God for having "largely augmented our free population by emancipation and by immigration."
Lincoln spoke those words when there were but 34 million Americans and half a continent remained to be settled. Today, however, the United States is a nation of some 264 million souls on a continent developed beyond Lincoln's imagination. It is also a nation experiencing immigration on a scale never before seen. In the past three decades, since the passage of the Immigration and Nationality Act of 1965, the first major revision in American immigration statutes since the historic closure of immigration in the 1920s, some 24 million immigrants have entered the United States. To put those numbers in perspective: prior to 1965 the period of heaviest immigration to the United States was the quarter century preceding the First World War, when some 17 million people entered the country - roughly half the total number of Europeans who migrated to the United States in the century after 1820 (along with several hundred thousand Asians). The last pre-war census, in 1910, counted about 13.5 million foreign-born people in the American population, in contrast to about 24.5 million in 1997. Historians know a great deal about those earlier immigrants - why they came, how they ended up, what their impact was on the America of their day. Whether America's historical experience with immigration provides a useful guide to thinking about the present case is the principal question I want to address. I want not only to explore the substantive issue of immigration but also to test the proposition that the discipline of history has some value as a way of knowing and thinking about the world.
* With respect to immigration itself, I intend to explore two sets of questions.
* Why did people migrate to America in the past, and what were the consequences, for them and for American society, once they landed?
* Why are people migrating to America today, and what might be the consequences, for them and for American society, of their presence in such numbers?
The Pull of America
A generation or two ago upbeat answers to the first pair of questions so pervaded the culture that they cropped up in the most exotic places - in Tunisia, for example, on July 9, 1943. The occasion was the eve of the invasion of Sicily, and General George S. Patton Jr. was addressing his troops, who were about to embark for the battle. He urged, "When we land, we will meet German and Italian soldiers whom it is our honor and privilege to attack and destroy. Many of you have in your veins German and Italian blood, but remember that these ancestors of yours so loved freedom that they gave up home and country to cross the ocean in search of liberty. The ancestors of the people we shall kill lacked the courage to make such a sacrifice and continued as slaves."
In his own inimitable idiom Patton was invoking what for most Americans was - and still is - the standard explanation of who their immigrant forebears were, why they left their old countries, and what was their effect on American society. In this explanation immigrants were the mainchance-seeking and most energetic, entrepreneurial, and freedom-loving members of their Old World societies. They were drawn out of Europe by the irresistible magnet of American opportunity and liberty, and their galvanizing influence on American society made this country the greatest in the world.
A radically different explanation of immigration has also historically been at work in the American mind. …