I have three boys. And I wanted to make sure it connected with them and then those guys who grew up like me, in environments like me.And then I knew something about science that your New York Times reader would be interested in. So I was thinking about it in multiple ways: I'll connect with the people who grew up like me first, and then the New York Times reader will be interested in the science because it's so good and they want to be "in the know."

When you have the national narrative being "crack is awful and black people are using it," why go against that narrative when you want to get that publication in The New York Times or wherever? It encourages people to play right into it.

I've had investigations of my lab because people didn't like what I had to say. And when you have investigations and you're doing research, you're shut down for a while. You have to start all over again. So that's one area where I paid a high price.

You have rappers saying "stay off drugs, go to school" - empty verbal behavior. I think all of this became institutionalized in the early '90s. And it's become more and more solidified, more and more entrenched.

One of the things that has happened is that our drug laws have been institutionalized now. If you want to say that somebody's a bad person in a movie or in a television show or something about that, you say they sell drugs or they use drugs.

I have three boys. And I wanted to make sure it connected with them and then those guys who grew up like me, in environments like me.And then I knew something about science that your New York Times reader would be interested in. So I was thinking about it in multiple ways: I'll connect with the people who grew up like me first, and then the New York Times reader will be interested in the science because it's so good and they want to be "in the know."

The policy that received more attention particularly in the past decade and a half or so has been the US cocaine policy, the differential treatment of crack versus powder cocaine and question is how my research impacted my view on policy. Clearly that policy is not based on the weight of the scientific evidence. That is when the policy was implemented, the concern about crack cocaine was so great that something had to be done and congress acted in the only way they knew how, they passed policy and that's what a responsible society should do.