
The decade of the twenties, or more precisely the eight years between the postwar depression of 1920–21 and the stock market crash in October of 1929, were prosperous ones in the United States. The total output of the economy increased by more than 50 per cent. The preceding decades had brought the automobile; now came many more and also roads on which they could be driven with reasonable reliability and comfort, There was much building. The downtown section o[ the mid-continent city—Des Moines, Omaha, Minneapolis—dates from these years.