During the nineteenth century, Charles Darwin presented a view that was to have a revolutionary effect on how we conceived of ourselves and our place in the world. Darwinism stood opposed to the two traditional views that had been assumed for centuries, the Classical view and the Judeo-Christian view. According to the Classical view, human nature is primarily distinguished by its rational capacities. For example, Plato considered the human soul to be composed of reason, will, and appetite. Plato thought that reason should govern the appetite and enforce its conclusions through the will. Similarly, Aristotle thought that humans are ‘rational animals’, sharing much in common with our creaturely neighbors but distinguishing ourselves by our unique rational faculties. Aristotle considered the powers of human reasoning to be their highest power, a power that should be trained to function properly in accordance with its nature. According to the Judeo-Christian view, humans are made in t...