Marijuana is less harmful than alcohol and nictotine. Unlike alcohol, nicotine, and caffeine, it is nonaddictive.
It was made illegal in the 1930s due to a hysterical scare campaign that was openly racist. Being associated with African-Americans and Latinos, it was denounced as unfit for white Anglo people who were duty-bound to maintain their racial purity and superiority by shunning the ways of nonwhites.
The reasons given for outlawing it were openly, blatantly racist. If anyone started such a campaign nowadays, it would be instantly discredited. So how could anyone justify keeping it illegal?
Who benefits from its illegality? Only organized crime and the law enforcement establishment. What benefit does its outlawing bring the citizens? The main effect on the citizens I can see is a waste of tax dollars, pointless entanglement in South American guerrilla warfare (in which an American missionary was shot and her baby killed), and the serious potential for erosion of civil liberties including the Fourth Amendement.
Europeans have their heads on straight about it, by treating drug habits as a social problem to be treated gently and compassionately, not a criminal problem to be stamped out with brutal force and idiotic zero-tolerance enforcement. When the District of Columbia voted to allow medicinal marijuana, right-wingers in Congress refused to allow the election results to be certified. So much for “states’ rights” versus the Feds, you miserable hypocrites!
FTR, I do not use marijuana or any other mind-altering substance (except caffeine, and that not very much). I have observed its effects on people I know, and honestly, compared with legal drugs, it just ain’t all that detrimental. I have no intention of using marijuana myself for any reason, even if it were legalized. As a student of herbal medicine, I found that marijuana has an ancient, honorable history of use in helping people in many civilizations. Modern research has shown its effectiveness in treating some conditions. With its lack of inherent harmfulness, the harm caused by outlawing it, the racism at the source of its outlawing, and its potential benefit, I can only conclude that marijuana isn’t criminal, its outlawing is what’s criminal.