No one knows the precise amount of alcohol consumption in the 1920s, but the trend lines are pretty clear from those bodies of literature. For the first few years after Prohibition was adopted, consumption fell dramatically. Then, beginning around 1923, it started to rise, and rose steadily after that, with the rise continuing after Repeal in 1933. Imagine graphing those results. Now look at the following graph of abortion rates in the United States since Roe v. Wade.
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