World War I - President Woodrow Wilson signed the Shepard Act (1916) to ban alcohol in Washington D.C. Almost did not sign, but if he vetoed it then it would split the party right before the war
Women’s suffrage - most women supported it to prevent abuse at home and maintain a civilized lifestyle.
Methodist Board of Temperance, Prohibition, and Public Morals - pushed for prohibiton’s aggressive enforcement and tried to stop any criticism regarding it
Ku Klux Klan - also known as the second KKK and was one of the major supporters of the movement