21. Levittown, built on Long Island in the 1940s, was the first suburbs with thousands of homes built in one project.

22. Government policies intensified the patterns of racial segregation that developed with "white flight."  The FHA often refused to give blacks mortgages, limiting them to the inner city and forcing many to live in public housing projects, which often followed a neighborhood composition rule, building homes for blacks in already black neighborhoods.

Postwar Baby Boom
23. The most dramatic upheaval in postwar America was the "baby boom," resulting in more than 50 million babies by the end of the 1950s.

24. In 1957, a drop in birth rates followed.  In 1973, the fertility rates dropped too low to maintain the existing population.  The only thing that lifted the US population above 264 million people in 1996 was immigration.

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