In 1991, Randy Paige interviewed Milton Friedman in 1991 about his stance on the legalization of drugs. Friedman was of the opinion that all drugs should be legal, and he believed that the fact that they were illegal was the largest reason for the problems surrounding drug use.
I’m in favour of legalizing drugs. According to my values, if people want to kill themselves, they have every right to do so. Most of the harm that comes from drugs is because they are illegal.
Watch Friedman make the classic economic defence for legalizing drugs.