Yet the idea goes against decades of the prohibitionist policy backed by the United States, which is largely followed and enforced in Latin America and the Caribbean.

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According to Mr Miron at Harvard University, the US has historically been the most prohibitionist of any major country.

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An example of a prohibitionist model is the recording industry shutting down file-sharing to reign in intellectual property.

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The war-time prime minister served as a politician in Dundee between 1908 and 1922, when prohibitionist Edwin Scrymgeour swept to victory.

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