Weed.
...
I didn't realize you favored legalization of pot. Huh. Learn something new every day.
Personally I favor the legalization of all substances.
Reason 1: It's not the government's business what you put in your body. You own your own body.
Reason 2: Legal drugs would eliminate the violent and bloody black market trade.
Reason 3: For the children! Legal drugs would be harder for kids to get. Right now, according to surveys of high schoolers, it's easier to get illegal substances than it is to get alcohol.
Reason 4: Legal drugs would be safer. If manufacturers were liable for their products, they would make sure that their heroin, for example, was pure and uncut.
Most Heroin "overdoses" are actually poisonings or allergic reactions (to quinine, for example). Before Heroin was illegal, overdoses were almost unheard of, despite it's potency being approximately 40 times what it is today.
Reason 5: Legal drugs would be cheaper. It would be less likely for people to turn to crime to support their bad habits if the price was not so high.
Reason 6: Many drugs that are prohibited now, such as Marijuana or Ibogaine, can actually be used to treat addictions to harder substances.
Reason 7: The money saved on drug war could reduce taxes or be spent on things which actually help the people.
I can go on and on. There is very little positive benefit to the drug war. Where is demand there will be supply, period.