Canada's Policy of Prohibition Criminalizes Unconventional Thought In Canada today, marijuana use and its perceived danger to society is considered a legal issue. But history reveals that marijuana prohibition isn't really about the effects of THC. In 1937, the United States began prohibiting the plant as an excuse to repatriate illegal Mexican immigrants. Since so many used and sold the drug, prohibition legitimized the deportation of these people. Canada, swayed by the American rhetoric of fear (a proud tradition we continue to this day), followed suit and began arresting users. [continues 892 words]