In America's manufacturing industry, which technological innovation allowed industrial output to be improved without expanding workforce, the prosperity of the 1920s rested on what historians called the second industrial revolution.
Individual entrepreneurs such as John D. Rockefeller in oil and Andrew Carnegie in steel were successful in the late nineteenth century.
Most business leaders have suffered from the wartime gains of organized labour, and sympathies with trade union members from government agencies like the National War Labor Board
No other development matched the effect on American way of working, living and playing by the post-war automotive explosion.
Furthermore, cars encouraged urban and suburban growth.
The early film industry, based in NYC and a few other major cities, had regularly made film for millions of Americans, in particular immigrants and the working class.
In the autumn of 1920 Westinghouse Manager Harry P. Davis realized that the local Pittsburgh press had drawn attention to amateur radio from an employee's garage
In the post-war years a new type of journal, the tabloid became popular.
The growing importance of consumer goods in American lives was reflected and encouraged by a thriving publishing industry.
The phonographer became a popular medium for entertainment in the 1920s, just like radio and cinema.
In the 1920s, the popularity and profitability of spectator sports were unprecedented.
The elite figures in a new culture of celebrity defined by the mass media became film stars, radio personalities, sports heroes and popular musicians.
In 1920, the Association reorganized itself as the Women's Women's League of Voters.
In particular, the Sheppard-Towner Act of 1921 set up the first federally financed healthcare program, providing the corresponding funds for states to set up prenatal and child health centers, was the greatest, if limited, victory for female reformers.
While restriction on immigration sharply diminished the flow of newcomers from Europe, Mexicans also dramatically flooded the United States during the 1920s.
The Big Migration Initiated by the First World War, the 1920s had shown no signs of leaving and African communities were growing fast in the northern cities.
This faith was one of the common denominators of the Harlem Renaissance figures.
In the 1920s many intellectuals were troubled by war, prohibition, increasing corporate power and deep currents of cultural intolerance.
The 1928 presidential election was a national referendum about the new era of the Republic.