1948

New York power broker Robert Moses deliberately routes the Cross Bronx Expressway (begun 1948) through densely populated working-class neighborhoods, displacing approximately 60,000 residents — disproportionately Black and Jewish. Moses is documented as deliberately designing parkway overpasses too low for buses, ensuring Black residents without cars cannot access Long Island beaches and parks. His public housing projects are deliberately sited in Black neighborhoods, concentrating poverty. Robert Caro's 1974 biography documents Moses's racial animus in infrastructure design.

By 1948, the House of Representatives has passed anti-lynching bills three times — in 1922, 1937, and 1940 — all blocked by Senate filibuster led by Southern Democrats. Despite Truman's advocacy and the NAACP's decades-long campaign, Southern senators again prevent a floor vote in 1948. The pattern of House passage and Senate filibuster repeats throughout the 1950s. The United States does not pass a federal anti-lynching law until the Emmett Till Antilynching Act in 2022 — 74 years after Truman's advocacy.

In Shelley v. Kraemer (1948), the Supreme Court unanimously rules that state courts cannot enforce racially restrictive covenants in property deeds. The case arises when J.D. Shelley, a Black man, purchases a home in St. Louis with a covenant barring non-Caucasian occupancy and is sued by neighbor Louis Kraemer. Thurgood Marshall argues the case. The ruling is significant but limited: private parties can still agree not to sell to Black buyers; courts simply cannot enforce those agreements. Real estate agents and neighborhood associations continue operating informal exclusion systems.

On July 17, 1948, after Hubert Humphrey's civil rights plank is adopted at the Democratic National Convention, Southern delegates from Alabama and Mississippi walk out. They form the States' Rights Democratic Party — the Dixiecrats — and nominate Strom Thurmond for president on a platform of racial segregation. Thurmond wins four Deep South states and 39 electoral votes. The Dixiecrat revolt begins the long process of Southern white voters shifting from the Democratic to the Republican Party, ultimately restructuring American politics around racial backlash.

On July 17, 1948, after Hubert Humphrey's civil rights plank is adopted at the Democratic National Convention, Southern delegates from Alabama and Mississippi walk out. They form the States' Rights Democratic Party — the Dixiecrats — and nominate Strom Thurmond for president on a platform of racial segregation. Thurmond wins four Deep South states and 39 electoral votes. The Dixiecrat revolt begins the long process of Southern white voters shifting from the Democratic to the Republican Party, ultimately restructuring American politics around racial backlash.

The Court rules racially restrictive housing covenants unenforceable.

Executive Order 9981 ends segregation in the US military.