First radio broadcasts are heard. Sinclair Lewis publishes Main Street. First organized professional football league is formed. Bill Tilden becomes the first American to win at Wimbleton. The flapper age begins.
Speakeasies open around the country.
First contraceptives, pogo sticks, and Brillo are introduced. Eight Chicago White Sox are indicted for fixing the Series. 1921 Arkansas River flood kills 1,500. KKK rallies multiply throughout the South. First Miss America is crowned.