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

If you catch somebody doing something wrong, he will just cringe away and curl up. He will not listen anymore. Instead, he will think of how he can counterattack.

I think the most important thing to do is to be willing to listen, willing to care, and willing to admit mistakes and change your ways for the better!

Every stage of my life set the scene for the next, and at each point all I had to do was say "yes" and not think too much about the consequences.

Even chimps understand the concept - if a troop of chimps enters a fruit tree, they will only pick the fruits that are ripe and leave the others growing. That is sustainability.

I've always felt you don't have to be completely detached, emotionally uninvolved to make precise observations. There's nothing wrong with feeling great empathy for your subjects.

If you educate women, family size tends to go down.