Legalization of Marijuana

Recently during a Q&A at the University of Alberta, interim Liberal leader Bob Rae was asked his position on legalizing marijuana. He said he believed in decriminalizing marijuana because criminal prohibition has not helped the issue of drug abuse or drug related crime. Prohibition of alcohol  actually led to the rise of crime syndicates in the united states, such as that of Al Capone. Supporters of legalization state that it will take profits out of the hands of criminals and place it in the national budgets. Whats your opinion?