It is not only visitors to the zoo who are fascinated but uneasy in the presence of chimpanzees; the same is true of scientists. The more they learn about these great apes, the deeper our identity crisis seems to become. The resemblance between humans and chimpanzees is not only external. If we look straight and deep into a chimpanzeeโs eyes, an intelligent, self-assured personality looks back at us. If they are animals, what must we be?
Frans de WaalArmies are a purely human invention. Most soldiers who go to war nowadays don't even do it because they're inherently aggressive.
Frans de Waal