It averted war and solved remaining issues from the Treaty of paris of 1783
<span>The 1920s were an age of dramatic social and political change. For the first time, more Americans lived in cities than on farms. The nation's total wealth more than doubled between 1920 and 1929, and this economic growth swept many Americansinto an affluent but unfamiliar “consumer society.”</span>
He easily won reelection because of the person he was running against. He also won because before he had created the new deal, which brought a lot of people jobs. People wanted him to stay because of his programs.
Hope this helps!:)