Jane Goodall

I had to leave these fascinating chimpanzees for my students and field staff to continue studying, because finding they dwindled from about 2 million 100 years ago to about 150,000 now.

I knew I had to leave the forest to do what I could to raise awareness around the world.

And the more I talked about the chimpanzees' plight, the more I realized the fact that everything's interconnected.

And the problems of the developing world so often stem from the greed of the developed world.

Everything was joining together and making not sense.

Hope lies in sense, you said.

It's making a nonsense.

How can we do it?

And as I was traveling around, I kept meeting young people who'd lost hope.

They were feeling despair.

They were feeling, well, it doesn't matter what we do.

Eat, drink, and be merry, for tomorrow we die.

Everything's hopeless.

We're always being told so by the media.

And then I met some who were angry, an anger that can turn to violence.

And we're all familiar with that.

And I have three little grandchildren.

When some of these students would say to me, high school or university, they'd say, we're angry or we're filled with despair because we feel you've compromised our future and there's nothing we can do about it.

And I looked in the eyes of my little grandchildren and think how much we've harmed this planet since I was their age.

I feel this deep shame.