By the 1910s, the Anti-Saloon League:

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By the 1910s, the Anti-Saloon League had become one of the most effective pressure groups in American history, using a combination of grassroots organizing, lobbying, and propaganda to build a broad-based coalition in support of Prohibition. They were instrumental in the passage of the Eighteenth Amendment, which established Prohibition, and remained a powerful force in American politics until the repeal of Prohibition in 1933.