The 1920s in America was a period of dramatic social and cultural upheaval, and immigration patterns were at the heart of many of these transformations. Following the immense societal strains of World War I, a powerful wave of nativism swept across the United States, fueled by xenophobia, economic anxieties, and a desire to preserve a perceived Anglo-Saxon cultural dominance. This sentiment manifested in increasingly restrictive federal policies, most notably the Immigration Act of 1924, which fundamentally altered the ethnic makeup of newcomers and had lasting repercussions for American society. The era's immigration story is thus one of a nation grappling with its identity, caught between its historical role as a haven and a rising tide of nationalistic sentiment that prioritized exclusion.
The post-war environment provided fertile ground for anti-immigrant feeling. Fears of radical political ideologies, often associated with recent arrivals from Eastern and Southern Europe, contributed to a climate of suspicion. The Red Scare of 1919-1920, though primarily focused on domestic radicalism, also served to demonize immigrant groups perceived as threats to American institutions. Economic competition, real or imagined, also played a role. As soldiers returned from the war and sought employment, some segments of the population viewed immigrants as competitors for jobs, particularly in industrial centers. This economic anxiety was often racialized, with established immigrant groups and native-born workers alike expressing resentment towards newer arrivals. Organizations like the Ku Klux Klan experienced a resurgence in the 1920s, extending their hateful ideology beyond anti-Black racism to target Catholics, Jews, and immigrants from Southern and Eastern Europe.
In response to these pressures, Congress enacted a series of progressively restrictive immigration laws. The Emergency Quota Act of 1921 was an early indicator of this shift. It established national origin quotas, limiting the number of immigrants from any given country to 3% of the number of foreign-born persons of that nationality already residing in the United States as of the 1910 census. While seemingly a step towards regulation, it was a clear departure from the more open-door policies of earlier decades. This act disproportionately favored immigrants from Northern and Western Europe, whose populations were larger in the 1910 census, and significantly reduced the number of arrivals from Southern and Eastern Europe.
The culmination of this nativist impulse arrived with the Immigration Act of 1924, also known as the Johnson-Reed Act. This legislation was far more stringent than its predecessor. It reduced the quota to 2% of the foreign-born population according to the 1890 census, a year when the numbers of Southern and Eastern European immigrants were considerably lower. Crucially, the 1924 Act also introduced a permanent national origins system that aimed to preserve the existing racial composition of the United States. It established quotas for European countries based on their proportional representation in the U.S. population as of 1790, heavily favoring Great Britain, Germany, and Ireland. Furthermore, it explicitly barred immigration from most of Asia, effectively formalizing the exclusion that had been in place for Japanese immigrants since the Gentlemen's Agreement of 1907. The act's architects openly declared their intention to maintain the country's "Nordic" character.
The impact of these laws was profound. The sheer volume of immigration to the United States plummeted. Between 1901 and 1910, nearly 8.8 million immigrants arrived; by the 1920s, that number had fallen to just over 4.1 million, and by the 1930s, it would be even lower. The ethnic composition of immigrants shifted dramatically. While immigrants from Italy, Poland, and Russia had constituted a significant portion of arrivals in the early 20th century, their numbers were drastically curtailed. Conversely, the proportion of immigrants from countries like Great Britain and Germany increased. This policy effectively reshaped the demographic future of the nation for decades, slowing the pace of cultural assimilation and altering the mosaic of American society. The era's immigration policies, born from fear and a desire for cultural homogeneity, left an indelible mark on the nation's identity and its relationship with the wider world.