Eighteenth Amendment

"Section 1. After one year from the ratification of this article the manufacture, sale, or transportation of intoxicating liquors within, the importation thereof into, or the exportation thereof from the United States and all territory subject to the jurisdiction thereof for beverage purposes is hereby prohibited."

The woman's movement is what ultimately lead to the passing of the prohibition.

Men still drank even though alcohol was illegal.  Prohibition didn't stop anything.