"One result of improvements in infrastructure and affordable transportation in the 1950s was the mass movement of people to the suburbs. The post WWII economy led to the construction of new roads and highways and the production of affordable cars. These factors led to cultural change in the United States by enabling people to live away from the cities but still access their benefits."
Increasing supplies of food caused prices to drop. Farmers went into debt to pay for new technology. There weren't enough workers to harvest larger crops.
