Answer:
Depression and war had created a postwar housing crisis and to help make decent, affordable housing available, the federal government passed laws that encouraged suburban housing development. Racial fears, affordable housing, and the desire to leave decaying cities were all factors that prompted many Americans to flee to the suburbia outside cities.
3/4s of the States are needed to ratify an amendment to the Constitution.
Today, this would mean that 38 states would need to approve an amendment at the state level for the amendment to be added.