From Talk Left here.
Another voice in the small but growing crowd urging legalization of drugs to end the Mexico drug war violence: Harvard Senior Lecturer in Economics Jeffrey Miron.
Argument 1: Prohibition creates violence. It happened with alcohol and gambling. End the prohibition, end the violence.
Prohibition creates violence because it drives the drug market underground. This means buyers and sellers cannot resolve their disputes with lawsuits, arbitration or advertising, so they resort to violence instead.
Violence was common in the alcohol industry when it was banned during Prohibition, but not before or after. Violence is the norm in illicit gambling markets but not in legal ones. Violence is routine when prostitution is banned but not when it's permitted. Violence results from policies that create black markets, not from the characteristics of the good or activity in question. The only way to reduce violence, therefore, is to legalize drugs (emphasis supplied.)
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Read the whole thing. Sounds rational to me. And then the government can tax the drugs. We need the money.