In the 1920s Americans just got out of WWI and they won so there was a boost in the economy. Also, industrialization and electricity was spreading.
World War I was called the Great War. People thought that it would be the war to end all wars.
Hope that helps
4 2 5 i’m sorry if wrong that’s what i think the answers are
The equal-field system (Chinese: 均田制度; pinyin: Jūntián Zhìdù) or land-equalization system was a historical system of land ownership and distribution in China used from the Six Dynasties to mid-Tang dynasty. ... The system was eventually adopted by other kingdoms and its use continued through the Sui and Tang dynasties.