Humans make the mistake of believing that it is their right to survive. Species die out on this planet all the time without anyone noticing. The planet will still be there, and we must lose this attitude of divine right, that something will save us.

When the world is running down, you make the best of what's still around.

The War on Drugs has failed - but it’s worse than that. It is actively harming our society. Violent crime is thriving in the shadows to which the drug trade has been consigned. People who genuinely need help can’t get it. Neither can people who need medical marijuana to treat terrible diseases. We are spending billions, filling up our prisons with non-violent offenders and sacrificing our liberties.

I come from a family of losers, and I've rejected my family as something I don't want to be like.

Yoga introduced me to a style of meditation. The only meditation I would have done before would be in the writing of songs.

How can I save my little boy from Oppenheimer's deadly toy?

I have been through various fitness regimes. I used to run about five miles a day and I did aerobics for a while.