Between 1880 and 1929, industrialization and urbanization expanded in the United States faster than ever before. Industrialization, meaning manufacturing in factory settings using machines plus a labor force with unique, divided tasks to increase production, stimulated urbanization, meaning the growth of cities in both population and physical size. During this period, urbanization spread out into the countryside and up into the sky, thanks to new methods of building taller buildings. Having people concentrated into small areas accelerated economic activity, thereby producing more industrial growth. Industrialization and urbanization thus reinforced one another, augmenting the speed with which such growth would have otherwise
