"The sheer scale of America in the 1920s was impressive, and its variety was downright astonishing. The nation’s population had nearly doubled since 1890, when it had numbered just sixty-three million souls. At least a third of the increase was due to a huge surge of immigrants. Most of them had journeyed to America from the religiously and culturally exotic regions of southern and eastern Europe. Through the great hall in the immigrant receiving center on New York’s Ellis Island, opened in 1892, streamed in the next three decades almost four million Italian Catholics; half a million Orthodox Greeks; half a million Catholic Hungarians; nearly a million and a half Catholic Poles; more than two million Jews, largely from Russian-controlled Poland, Ukraine, and Lithuania; half a million Slovaks, mostly Catholic; millions of other eastern Slavs from Byelorussia, Ruthenia, and Russia, mostly Orthodox; more millions of southern Slavs, a mix of Catholic, Orthodox, Muslim, and Jew, from Rumania, Croatia, Serbia, Bulgaria, and Montenegro. The waves of arrivals after the turn of the century were so enormous that of the 123 million Americans recorded in the census of 1930, one in ten was foreign born, and an additional 20 percent had at least one parent born abroad."