"An Enquiry Concerning Human Understanding" is the thesis of a thinker who was a scientist, psychologist, metaphysician, and skeptic who continues to fascinate contemporary minds. The product of both youthful fire and mature consideration, the "Enquiry", 'contain[s] everything of Consequence relating to the understanding'. In the face of skepticism, the "Enquiry" offered progress based on experience. In a time of dogmatism, the "Enquiry" dissected the basis of religious faith and delivered a still-powerful critique. It endeavors to be nothing less than the construction of an anatomy of human nature.