Science could never get you to make alcohol and tobacco legal and marijuana illegal. Only racism can do that.

Marijuana is not not harmful, but is the least harmful psychoactive substance that we have, with the possible exception of caffeine.

Because addiction is a developmental problem, the developmental stage is important, things like employment are important, things like having a sense of purpose, meaning and hope are important, and this is why there's been so many spiritual cures for addiction, because those things often give people a sense of meaning and purpose.

I know that sounds really extreme, but if you just look at the history, you will find Harry Anslinger [first U.S. commissioner of the Bureau of Narcotics] going on about satanic swing and how reefer will make black people think they're as good as white people - which to him, obviously, was a very horrible outcome. This is the basis of our drug laws.

Drug warriors' staunch opposition to needle exchanges to prevent the spread of HIV in addicts delayed the programs' widespread introduction in most states for years. A federal ban on funding for these programs wasn't lifted until 2009. Contrast this with what happened in the U.K. At the peak of the AIDS epidemic in the mid-1990s, the HIV infection rate in IV drug users in the U.K. was about 1%. In New York City, the American epicenter, that figure was 50%. The British had introduced widespread needle exchange in 1986. That country had no heterosexual AIDS epidemic.

A lot of the stuff that we say about drugs is just wrong.

Do we really want to base our 21st-century policy on what the colonialist preferred at a certain time in history, not at all based on health or what the preferences of different cultures might be? That's just ridiculous.