zài zhěng gè 1920
nián dài，
nóng chǎn pǐn jià gé bù duàn jiàng dī，
gōng yè lì rùn dà fú zēngzhǎng，
měi guó jīng jì fā zhǎn dé yì cháng fán róng。
zhè bō jīng jì chéngzhǎng hái bèi xìn dài shàng shēng hé gǔ piào shì chǎng de xīng shèng tuī bō zhù lán。
zhōng yú gǔ shì zài 1929
nián dà bēng pán，
suí zhī '
ér lái de shì jīng jì dà kǒng huāng。
wèile fù sū jīng jì，
fù lán kè lín ·
dé lā nuò ·
luó sī fú zhèng fǔ shí xíng xīn zhèng，
dà fú zēng jiā zhèng fǔ duì jīng jì de gān yù。
rán '
ér xīn zhèng què méi yòu wán quán shēng xiào，
měi guó jīng jì zhí dào dì '
èr cì shì jiè dà zhàn hòu cái chè dǐ fù sū。
Following World War I, the U.S. grew steadily in stature as an economic and military world power. The United States Senate did not ratify the Treaty of Versailles imposed by its Allies on the defeated Central Powers; instead, the United States chose to pursue unilateralism, if not isolationism. The aftershock of Russia's October Revolution resulted in real fears of communism in the United States, leading to a three-year Red Scare and the U.S. lost 675,000 people to the Spanish flu pandemic in 1918.
In 1920, the manufacture, sale, import and export of alcohol was prohibited by the Eighteenth Amendment to the United States Constitution. Prohibition encouraged illegal breweries and dealers to make substantial amounts of money selling alcohol illegally. The Prohibition ended in 1933, a failure. Additionally, the KKK re-formed during that decade and gathered nearly 4.5 million members by 1924, and the U.S. government passed the Immigration Act of 1924 restricting foreign immigration. The 1920s were also known as the Roaring Twenties, due to the great economic prosperity during this period. Jazz became popular among the younger generation, and thus was also called the Jazz Age.
During most of the 1920s, the United States enjoyed a period of unbalanced prosperity: farm prices and wages fell, while new industries, and industrial profits grew. The boom was fueled by an inflated stock market, which later led to the a crash on October 29, 1929. The Hawley-Smoot Tariff, the Dust Bowl, and the ensuing Great Depression led to government efforts to restart the economy and help its victims with Franklin D. Roosevelt's New Deal. The recovery was rapid in all areas except unemployment, which remained fairly high until 1940.