Immigration to America: Gateways, Quotas, and the Making of a Nation
The United States is, more than almost any other nation, a country built by people who came from somewhere else — and a country that has argued bitterly, in every generation, about whom to let in. The history of American immigration is not a single welcome but a long swing between open arms and closed gates: the Great Wave that filled the cities, the nativist backlash that shut the door, and the 1965 law that opened it again and remade the nation.
This guide follows that arc: the gateways and the Great Wave, the era of nativism and restriction, and the modern reopening. Each entry links to a full account, and together they trace how a nation of immigrants kept redefining who counted as one.
Between the 1840s and the 1920s, more than thirty million people crossed an ocean to reach the United States — the largest movement of people the country has ever seen. They came through famous gates: Ellis Island in the east, Angel Island in the west, beneath a statue that a poet had turned into a promise. These entries cover the era of open arms, and the cities and symbols it created.
Every wave of newcomers met a backlash, and by the early twentieth century that backlash had the force of law. Fear of the foreign-born — by turns racial, religious, and economic — hardened into exclusion acts and quota systems designed to freeze the population's makeup in place. These entries trace how a nation of immigrants spent half a century trying to stop being one.
The closed door held until 1965, when a single law swept the quotas away. Born of the civil rights era, the Hart-Celler Act ended the national-origins system and, against its own sponsors' predictions, transformed who came to America — pointing the country toward the diverse, contested, immigrant nation of the present.
Immigration runs through the rest of American history — the cities it built (the full timeline), the diplomacy it shaped (America and China), and the rights movements it joined.