History shows that mood governs society’s tolerance for recreational drugs. A rising social mood produces prohibition of substances such as alcohol and marijuana; a falling mood produces tolerance and relaxed regulation. In the case of alcohol, the path from prohibition to decriminalization became littered with corruption and violence as the government waged a failed war on traffickers. Eventually, as mood continued to sour, the government finally capitulated to public cries for decriminalization as a means to end the corruption and bloodshed.