One of the arguments against the legalization of marijuana is that more teenagers will end up using it. But data show that teenage use of cannabis decreased after legalization.
Proposals for drug legalization are rooted in the belief that drug prohibition does not work. Legalization advocates point out that the prohibition of alcohol failed in the United States two generations ago. They argue that the use of illicit drugs is widespread despite prohibition and that the high costs and negative consequences of that prohibition ranging from costs for police and prisons to the loss of privacy caused by drug testing in many settings, notably the workplace are unreasonably high prices to pay for an ineffective policy. But while prohibition has not been the perfect solution to the drug problem, legalization will likely lead to increases in drug use, addiction and drug-related death.