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.

A lot of addiction actually ends by age 30 - something like 50 percent of all addictions with the exception of tobacco - and I think a lot of what's going on there is that the self-control areas of the brain are finally developed enough to be able to stop yourself from relapsing or just continuing. There is a maturational aspect to it as well.

The best outcomes that are seen for therapy intervention and for other psychological interventions is where the therapist really connects and the person really feels understood. That matters often even more than the technique.

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.

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

We should not be putting kids in cages and hoping that is going to fix their psychological problems of any type.

The thing we want for all our kids is that they be connected with a learning community and that they have strong social and familial relationships. If we can do whatever we can do to create that and to reduce bullying and to reduce the kind of pain and shame so many kids feel for so many reasons, that stuff is going to reduce drug addiction.