Because the cause and effect set off the story or really whatever your writing
Key events:
1918: world war I ends.
1920: nineteenth amendement ratified.
1928: Herbert Hoover elected president.
1929: Stock Market Crash.
1930: Hawley Smoot Tariff passed.
1932: Franklin Roosevelt elected president.
1933: New Deal begins.
Hope this helps.
the governments power comes from the people
The war left behind destruction and bitterness in those nations.
