Many people seem to believe in that. I most definitely do not.
I must respectfully disagree.
It is premature to directly compare the two situations, however.
Alcohol had been socially accepted for millenia before the prohibition, and it was not fairly enforced in any case. Its main effect was to accentuate the social class differences and to send a message of discrimination.
Marijuana and other currently illegal drugs come from a very different place (although I will grant that Marijuana far less so than I would like).
Marijuana and opium have been widely used around the world for just as long as alcohol has. Opium was the party drug of choice in ancient Rome (they would put it in wine and drink it), and it was never frowned upon to do so. Roman soldiers were known to fill tents with marijuana smoke and stand in them for a while before marching out. The Boston Museum of Fine Arts has a collection of 2500+ year old Persian water pipes (aka bongs). Ancient priests were known to use hallucinogens in order to get in touch with their respective gods. Drug use has long been socially acceptable; we've actually only just recently started condemning it.
How can you be so sure that they are well aware of the true risks, though? Or that legalization won't embolden many who would otherwise abstain? For that matter, that the campaign for legalization does not?
I can't be 100% sure that people are fully aware of the risks, but with legalization would come education and regulation. People would know exactly what they're using, what it does, and have the security of knowing there's nothing else in it. As far as the other two questions, I can only offer up anecdotal evidence. The vast majority of people I know that use drugs don't do so to fit in or be a rebel, but rather just because they enjoy using them. And literally everyone I know that is against drugs isn't against them because they're illegal, but because of the negative physical/mental effects associated with drugs. I've never once heard someone say they would use drugs, but don't because it's illegal.
Not out of nowhere, true. It has been a very gradual and disastrous process, involving legal drugs and prescription medicine as well.
Again, I believe (with good reason) that drugs are already easy enough to obtain that anyone who wants to use them already does. Illegal drugs are not exactly hard to come by. Just go to any area anywhere with any amount of people in it.
I will grant you racial profiling. If you ask me, we do not have nearly enough drug-related arrests yet.
More than half of the prisoners currently incarcerated in the US (the country with the world's largest prison population) are serving time for drug crimes. I think there have been more than enough arrests. It's just becoming increasingly obvious that making arrests doesn't solve any problems.
And drug-related violence will only keep rising with the ever-increasing social acceptance of recreational drugs. Even continued legal restrictions can't do more than slow the rise a bit.
The overwhelming majority of drug-related violence isn't committed by people high on drugs, but rather by people selling them illegally. The majority of murders in the US are drug trade related, and Border patrol is literally at war with Mexican drug cartels.
At a far greater price. It does not make even economic sense that I can see.
Taking everything I just said into account, what exactly is the greater price? It can't be the widespread circulation of drugs; we already have that and a ton of violent crime to go with it.