In 1962, after two years studying chimpanzees, I went to Cambridge University to read for a PhD in ethology. There I was told there was a difference in kind between humans and other animals, that only we humans had personalities, minds, and emotions. But I had learned that this was not true from my childhood teachers, my wonderful mother and my dog, Rusty! So I refused to comply with this reductionist thinking. Eventually, because the chimpanzees are so similar to us biologically as well as behaviorally, most scientists accepted that we are part of the animal kingdom. But I received much criticism.