Answer:
Vincent van Gogh
Explanation:
You can tell by the style of the painting; also, it is called Wheatfield with Crows (you can search it up).
Much like many other countries, the US foreign policy was based in isolationism which resulted in new restrictions on immigration and a lack of membership in international organizations. There isn't a good explanation as to why it was isolationist in the first place besides the fact most countries were at that time so it made it easier for the US to do the same.
Europe and asia, i know for sure.
The optimism disappeared almost overnight when the Wall Street Crash, on October 29, 1929 (Black Tuesday), triggered the Great Depression starting the downward economic spiral that led to bankruptcies, mass unemployment, homelessness and despair.
Although the North and the South disagreed on all these things at some point, it was primary the disagreement over the spread of slavery that defined this era in the US.
Please correct me if I'm wrong!! :)