The Human Animal: A Personal View of the Human Species by Desmond Morris. Part 5. The Immortal Genes. Desmond Morris looks at the natural history of the human parent and child. Why do homo sapiens devote more time to raising their young than any other animal? What makes parents sacrifice so much for their children, and why, once the offspring have been raised, don't humans simply die off as other creatures do? Desmond reveals how children offer a way of overcoming death itself.