I do a fair amount of political blogging and I can’t tell you the number of socons who STILL favor Drug Prohibition. It is not just those feeding the beast. It is also those who WANT a big beast to sic on their neighbors. Not thinking about what the beast will do when it runs out of neighbors.
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The Chicago mob learned its tricks dealing dope. Dope dealing is profitable because of Prohibition.
Engineering is the art of making what you want from what you can get at a profit.