Recreational cannabis use may become legal in California this November. That’s right. Whatever you prefer to call it—pot, grass, weed, marijuana—like alcohol, would be legal. Cannabis is already permitted for medical purposes in 14 states. Millions of Americans use it for recreational purposes. Regulating it allows the government to tax it and control how it is used. This is not unlike the prohibition amendment in the early 20th century that led to a massive black market. When substances like alcohol and cannabis are forced underground, you simply feed crime, lose control of age limits, lose out of taxing it, send a lot of otherwise productive citizens to jail, create drug wars in other countries (e.g., Mexico), and make it more attractive to users.