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By 1916, over half of the U.S. states already had statutes that prohibited alcohol. In 1919, the 18th Amendment to the U.S. Constitution, which prohibited the sale and manufacture of alcohol, was ratified. It went into effect on January 16, 1920.
In December 1917 Congress adopted and submitted to the states the Eighteenth Amendment, known as the Prohibition amendment, which prohibited the manufacture, sale, or transportation of intoxicating liquors.. Ratified by the states in January 1919, it went into effect on January 20, 1920.8th amendment-Prohibition. The conservatism and the fast times of the 1920's had to clash at some point. That point turned out to be alcohol. Many Americans saw alcohol as an evil, to others it was a part of life.