Which part of the American lifestyle was changed the mosts after World War 2 and why?

you may think there was a negative and depressed economy after the war, but it was rather different. When World War II ended, the United States was in better economic condition than any other country in the world ... Building on the economic base left after the war, American society became more affluent in the postwar years than most Americans could have imagined in their wildest dreams before or during the war.