I'm almost in support of legal marajuana, purely so that we could have an answer as to whether or not legal pot would destroy a country.
That's the dumbest reason I've ever heard.
I'm in favor of legalizing all drugs, because they'll lose a lot of their "rebel" appeal, we'll be able to tax the shit out of the ones that do sell with nothing more than a "Surgeon General's Warning" being required on the packaging, and because people should be allowed to fuck themselves up however they want to.
On top of that, I think it'd actually save lives in 2 ways: it will save the lives of young people that still have a chance to change won't be thrown into prison, and the gateway effect for certain drugs would be much smaller not only because drugs will have a different social status, yet certain drugs won't be laced if you buy it at a pharmacy, for example.