Angelina is living proof of the power we all have — every one of us — to make a difference. I was deeply moved by her descriptions of individual refugees struggling to live with dignity and hope, and found her personal commitment to be an inspiration.

We can't leave people in abject poverty, so we need to raise the standard of living for 80% of the world's people, while bringing it down considerably for the 20% who are destroying our natural resources.

Chimpanzees, gorillas, orangutans have been living for hundreds of thousands of years in their forest, living fantastic lives, never overpopulating, never destroying the forest. I would say that they have been in a way more successful than us as far as being in harmony with the environment.

From my perspective, I absolutely believe in a greater spiritual power, far greater than I am, from which I have derived strength in moments of sadness or fear. That's what I believe, and it was very, very strong in the forest.

It was because the chimps are so eye-catching, so like us and teach us so much that my work was recognised worldwide.

I got to Africa. I got the opportunity to go and learn, not about any animal, but chimpanzees. I was living in my dream world, the forest in Gombe National Park in Tanzania. It was Tanganyika when I began.