Let's try this question: If marijuana and similar drugs suddenly ceased to exist, what would you do with your time?
Hmmmmmm this is a good question. Most of my weed smoking was done in college- I guess drinking. Or contemplation. More of the same of what I do actually- I would toke and then do my everyday evening activities (read books, watch TV, eat, IM people).
Eudemonia and Robert (and others) are assuming this:
When drugs are legalized, more people will use them. I don't believe this is the case. The Portugal study has shown this, as well as when Vancouver, BC essentially legalized marijuana. (In Vancouver there was a small uptick of marijuana use in the first three months, but then it went back to the levels it was at before.) I know kids who, in 10th grade, were smoking weed daily in the parking lot. (Although... I've only learned this after the fact, I was oblivious to drug use during high school. *sigh INTP*)
I believe that if people want to use drugs, they will use drugs, no matter the legal status of them.
I also believe that
there is life after drug abuse. If we treat drug abusers like criminals it makes it harder for them to get treatment and will restrict their development when they are put in prison.
Safety:
There's a strong argument for safety: But legalizing & regulating the drug industry we'll be able to better guarantee the products of the drug market. The vast majority of Ecstacy in the street has additions of Meth, Caffiene, and other stimulants. Cocaine is cut with a lot of fillers.
In the budding Research Chemical market there has been a recent tragedy- a RC manufacturer tested 2-C-B-FLY and died (at a dosage that would have usually been safe). Some contamination in his chemical process made it lethal. Maybe this entrepreneur would have gotten killed anyway, but I think that in a legalized & regulated environment there would have been alternative ways to test the drug.
Additionally, to get drugs now you have to go to drug dealers. I've known a lot of passive, happy, friendly pot dealers, but I imagine that at some point the drug dealers have to be vicious and ready to deal with criminal elements. (My dealers were mostly serving a university crowd.) It's dangerous. If it was legalized, we could buy drugs from a pharmacy in a well-lit area.
Finally, if we legalized drugs the money would go to entrepreneurs, pharmacies and companies, instead of drug cartels! Even though my friendly pot dealer wasn't part of a cartel, his supplier may have been- if not for his weed, then for his other substances. Drug cartels in Mexico are destroying the government and creating instability.
The Taliban receives $70 - 400 MILLION in opium profits. If we legalized the product we could actually have a chance at winning the war in Afghanistan! Right now Afghan opium farmers have no choice but to work with the Taliban, but if it was legalized they could come to the nationalist side.
Legalizing drugs would also lower the prices of them. One of the leading problems with cocaine users isn't the cocaine- it's when the coke heads run out of money. My friend R. was using ghastly amounts of cocaine, but her real problem started when she ran out of money. She still needed her fix, and turned to Meth, the cheaper & more dangerous alternative. Her physical well-being deteriorated, and she eventually went to rehab (twice). I'm happy to report that she's recovered, and is now engaged to a very supportive fiance.
I skimmed the CATO paper that lightspeed's Time article reference. It's free to download.
http://www.cato.org/pubs/wtpapers/greenwald_whitepaper.pdf
Here's the most shocking graph:
[BIMG]http://img267.imageshack.us/img267/3157/portugalsecondaryschool.jpg[/BIMG]
*phew* I'm going to leave my post with this.