When Charles Darwin published On the Origin of Species in 1859, he exposed the world to a momentous discovery . For the first time in history, human beings were seen not as creatures of divine origin, but instead, as a product of nature, an animal like every other on the planet. Imagine yourself back in that amazing year. The day before Darwin’s book was published, you wake up thinking yourself the image of God; the next morning you realize you have the face of a monkey. Not everybody immediately embraced this rude demotion from god to goat.

Human beings are not inevitable, and our brief existence is not preordained to be extended into the distant future. If Homo sapiens is to have a continued presence on earth, humankind will reevaluate its sense of place in the world and modify its strong species-centric stewardship of the planet. Our collective concepts of morality and ethics have a direct impact on our species’ ultimate fate.