About 1 million blacks had left the South, to move to the North for better job opportunities. This caused the population to increase for example New York (66 percent) Chicago (148 percent), Philadelphia (500 percent) and Detroit (611 percent).
Established the prohibition of alcoholic beverages in the United States by declaring the production, transport, and sale of alcohol. The importance in this is huge because this was the main cause for why there was later going to be so much mafia and crime.
Can not deny someone the right to vote based on their sex. This is significant because women could now vote and were seen more as equals to men.
The Charleston Dance was a very popular dance in the 1920 that was established in 1923. The Charleston involves the fast-paced swinging of the legs as well as big arm movements. This is important because the 1920's is mostly all partying which is how this dance was developed.
A law that restricted immigration by establishing a system of national quotas that discriminated against immigrants from southern and eastern Europe and excluded Asians. This kept immigration from a country to only 2% of residents who came from that country in the 1890's.
Henry's Ford Model T car lowered his prices from $850 to less than $300 in 1925 thanks to the assembly line. This is important because now the car was affordable to everyone and it was easier for everyone to find jobs (close to home or far) and gave people more freedom to move and do what they want.
"Winnie-the-Pooh" was published, which brought the adventures of Pooh, Piglet, Eeyore, and Christopher Robin to many generations of children TV was new at the time so this was the start of kids watching cartoons for entertainment.
Herbert Hoover was nominated as the Republican candidate, as President Calvin Coolidge chose not to run for a second full term. This is important because President Herbert Hoover made a promise to continue doing the same as his predecessors which he later broke.
Al Capone was the leader of the Chicago mafia. Al Capone and McGurn decided to kill Moran (Capone's enemy). Posing as police, McGurn’s gunmen assassinated seven of Moran’s men in cold blood. Bugs Moran escaped the slaughter. The public and the media immediately blamed him for the massacre. This is important because Al Capone was the main underground alcohol distributor this caused president Hoover decided to get Al Capone on income tax evasion.
The stock market crashes. This is very important because this leads to the great depression.