What political and economic challenges did the leading democracies face in the 1920s and 1930s?

During the 1920s and 1930s the political and economic challenges and trials encountered were:
1.Unemployment – many of the citizens were jobless
2.The great depression was encountered by the United States in 1929 because the stock market was crashed which caused a run on the banks.
3.There are strikes in Great Britain, the British economy was become slowly to recover
4.The United States had a post-war economic boom.