Positives: We started using planes to transport mail and cargo, started taking people short distances, and started using planes for entertainment. Henry Ford invented the first assembly line for cars this also got more businesses started because they wanted to be bigger and cars also got cheaper and more accessible because they were made in easier to be made. 3D movies, The hair dryer, Kool-aid, Band-aids, the lie detector, the 4-way traffic light were some major inventions in the 1920s.
Negatives: The red scare was the fear that the US had of us becoming a communistic country. Anti-immigration was then they had any immigrants they would give them a fluency tests, it basically eliminated all immigration from Europe. Al Capone was a big gangster in Chicago, he was selling alcohol when it was illegal then finally got arrested for tax ivasion.
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