Personal purity isn’t really the issue. Not supporting animal abuse – and persuading others not to support it – is.

Dolphins are social mammals, capable of enjoying their lives. They form close bonds with other members of their group.

I don't think nationalism is alone holding the field; it's in contention with a lot of different things.

We have a new generation of very rich people who want to do more with their money than buy a lot of expensive toys. They want to live meaningful lives.

Somebody who eats twice as much factory-farmed products as he or she needs to is clearly doing twice as much damage to the planet. From a utilitarian point of view, that's twice as bad.

Had Rumsfeld said at any time 'get me a report on what's going on', he could have had it. You're right, it depends on choices that we make, which parts of the world we want to be in immediate contact with.

Looking back on my career, I think I've been extremely fortunate to be in the right place at the right time in order to have the influence that I did.