From a very early age, human children seem to grasp the basic physical principles that govern how the world works. Nonhuman primates also manipulate and play wi... » 

From a very early age, human children seem to grasp the basic physical principles that govern how the world works. Nonhuman primates also manipulate and play with objects. Chimpanzees in particular possess a remarkable ability to make and use simple tools. What does this tell us about the inner mental states of these animals. This book outlines a new perspective on the innermost workings of the chimpanzee's mind. It represents a new goal for those interested in mental evolution: to begin to pursue the spectacular mental differences that exist between humans and other animals. «