In spite of the social, economic and technological advances, African Americans, recent immigrants and farmers—along with a large part of the working class population—were not much affected by this period. In fact, millions of people lived below the poverty line of US $2,000 per year per family.
The Great Depression demarcates the conceptualization of the Roaring Twenties from the 1930s. The hopefulness in the wake of World War I that had initiated the Roaring Twenties gave way to the debilitating economic hardship of the later era.
At the end of World War I, soldiers returned to the United States and Canada with money in their pockets and many new products on the market on which to spend it. At first, the recession of wartime production caused a brief but deep recession, known as the Post-WWI recession. Quickly, however, the U.S. and Canadian economies rebounded as returning soldiers re-entered the labor force and factories were retooled to produce consumer goods.
Urbanization reached a climax in the 1920s. For the first time, more Americans and Canadians lived in cities of 2500 or more people than in small towns or rural areas. However the nation was fascinated with its great metropolitan centers that contained about 15% of the population. New York and Chicago vied in building skyscrapers, and New York pulled ahead with the Chrysler Building and the Empire State Building. The finance and insurance industries doubled and tripled in