Making the world better, one answer at a time. The 21st Amendment (adopted in 1933) repealed the 18th Amendment (Prohibition) that had been adopted in 1919. The 18th amendment, along with acts such as the Volstead Act, had outlawed the manufacture, sale, and transportation of alcoholic beverages in the US.he 21st Amendment to the United States Constitution was passed, repealing the 18th Amendment, which outlawed trafficking in 'intoxicating liquors.' The 21st Amendment was pas … sed in order to undo the 18th Amendment.