In April, the United Nations will host a special assembly on what’s called the worldwide War on Drugs. The so-called War on Drugs is a vastly expensive failure, but good money is still being thrown after bad. But, rather than continuing to fight a losing battle, Tom Wainwright says it’s time for a change of thinking — treating drug cartels like the international businesses they really are. He’s author of Narconomics: How to Run a Drug Cartel.