We evolved. We have only to look at the pouting face of a young chimpanzee to laugh at its reflections of ourselves. We know that more then 98 percent of our genes are shared with the chimpanzee, but we feel the kinship directly when the furry baby puts up its arms to be held.
Lucy's Legacy: Sex and Intelligence in Human Evolution (ed. Harvard University Press, 2001) - ISBN: 9780674005402