Levittown, the Interstate, and White Flight

After World War Two, the country had a housing crisis: millions of veterans, the GI Bill in hand, wanted homes and the baby boom was filling them with kids. Developers like William Levitt answered with assembly-line construction. Instead of building one house at a time, crews moved in sequence across a site: one team poured foundations down an entire street, the next framed walls, the next did plumbing, the next roofing. The house stood still while labor moved past it like a factory line moves past a car. That cut costs and time enough to sell houses cheap and fast to young families, producing instant towns like Levittown, New York.

That demand only turned into ownership because the federal government insured the loans. The Federal Housing Administration and Veterans Administration guaranteed mortgages, which let banks offer long, low-down-payment loans instead of the short, expensive ones common before the war. But the FHA also graded neighborhoods by risk, and it colored older, racially mixed, or Black neighborhoods red on its maps, meaning no federally backed loans there, regardless of any individual applicant's income or credit. Levittown itself would not sell to Black families. So federal money built white wealth in new suburbs while starving older urban neighborhoods of mortgage capital.

The interstate highway system, launched in 1956, locked this geography in place. Highways let suburban commuters reach downtown jobs quickly, making far-flung suburbs livable, and planners routed many urban interstates straight through Black and immigrant neighborhoods, demolishing homes and businesses and walling off what remained. The result: a metropolitan map of federally subsidized, mostly white suburbs ringing cities whose tax bases and neighborhoods had been cut apart and starved of investment, a pattern that shaped the inequality later civil rights and urban movements confronted.