Final answer:
In 1970, it is true that more Americans lived in suburbs rather than cities, as a result of the suburban expansion that occurred in the 1950s and 1960s, fueled by affordable housing, automobiles, and government policies.
Step-by-step explanation:
True, in 1970 more Americans lived in suburbs than in cities. The suburban growth in the United States that began in the 1950s saw an increased number of Americans pursuing the American dream by moving from urban centers to the suburbs. During the 1950s, the construction of new homes in suburbs represented a significant 85% of the total, and by the end of the decade, the suburb population had grown by 46 percent. Post World War II policies and the introduction of the automobile culture, notably Henry Ford's affordable cars, were instrumental in enabling middle-class families to move to these areas, thereby accelerating urbanization and changing the demographic landscape of the country.