This era saw the large-scale use of automobiles, telephones, motion pictures, radio, and electricity; commercial, passenger, and freight aviation; as well as unprecedented industrial growth, accelerated consumer demand, plus significant changes in lifestyle and culture. The media focused on celebrities, especially sports heroes and movie stars, as cities rooted for their home teams and filled the new palatial cinemas and gigantic sports stadiums.
When Germany could no longer afford war reparations to Britain, France and other Allies, the Americans came up with the Dawes Plan and Gotham financial magnates invested heavily in Germany. Germany repaid its reparations to nations that, in turn, used the dollars to pay off their war debts to Washington. By the middle of the decade, prosperity was widespread, with the second half of the decade known, as the “Golden Twenties”.
The 20's saw the arrival of Prohibition and the spread of Bootlegging-based criminal enterprises.
While inter-gang violence and civic corruption were up, criminal violence toward ordinary citizens was not especially bad during this time.