Many think that the stock market cash had a major role in the Great Depression, however it did not play into this disaster very much at all.
They were intimidated by violent threats and actions.
During the 1960's, African-Americans still faced a significant amount of discrimination in American society. This included threats and physical violence. Groups like the Ku Klux Klan, a white supremacist organization, used fear tactics in order to stop African-Americans from voting during this era. This included death threats or actually violence if they showed up to the polling place.
"<span>the assassination of Archduke Franz Ferdinand" is thought to be the spark that lit the powder-keg </span>of war at the beginning of the 20th century. A dense web of alliances was set off from this shooting.
Manifest destiny - The idea to spread “from sea to shining sea” ( east to west)
This also ties with imperialism
Hope this helps!