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.