The law’s quota system was based on the census of 1890, before most southern European and Polish Catholics, and Jewish refugees from pogroms in the East, had crossed the Atlantic. As it happened, the best way to build a wall was to turn back the clock. America would be replenished with people who looked like the ethnic face of Indiana—a blueprint for a bloodstream. The effect was immediate and dramatic. In 1921, nearly a quarter million Italians had fled their country for the United States. By 1925, that number fell by 90 percent. About 200,000 Russian Jews arrived on American shores in 1921.
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