Mexico is the number one foreign supplier of marijuana abused in the United States. In fact, according to a 2008 inter-agency report, marijuana is the top revenue generator for Mexican DTOs—a cash crop that finances corruption and the carnage of violence year after year. The profits derived from marijuana trafficking—an industry with minimal overhead costs, controlled entirely by the traffickers—are used not only to finance other drug enterprises by Mexico’s poly-drug cartels, but also to pay recurring “business” expenses, purchase weapons, and bribe corrupt officials.

What a mess. Who'd have guessed that a drug known for producing feeling of pleasant relaxation would end up financing massive international networks of murderous gangsters.