For every Levittown there are also hundreds of neighborhoods that never got any better after they were built. I would argue that Levittown can't be disentangled from the economic period in the United States - and it reflected the improving economic position of the working class. That ended in the 1970's for the United States (the GDP kept rising but it has gone to the rich. And home ownership is the same percent right now as it was in the mid-1970's.)