With wide-ranging erudition, De Duve takes us on a dazzling tour of the biological world, beginning with the invisible workings of the cell, the area in which he won his Nobel Prize. He describes how the first cells may have arisen and suggests that they may have been like the organisms that exist today near deep-sea hydrothermal vents. Contrary to many scientists, he argues that life was bound to arise and that it probably only took millennia--maybe tens of thousands of years—to move from rough building blocks to the first organisms possessing the basic properties of life. With equal authority, De Duve examines topics such as the evolution of humans, the origins of consciousness, the development of language, the birth of science, and the origin of emotion, morality, altruism, and love. He concludes with his conjectures on the future of humanity—for instance, we may evolve, perhaps via genetic engineering, into a new species, and he shares his personal thoughts about God and immortality.