I should start by saying that I am well aware that Carl Sagan was not (in the strictest sense) a philosopher. His areas of expertise, as you may well know, were biology, physics, and mathematics. But he was a scientist who, unlike many of today’s most famous science advocates, had a deep respect for and interest in the humanities.
Indeed, in Sagan’s Pulitzer Prize-winning book on contemporary neuroscience and anthropology, The Dragons of Eden: Speculations on the Evolution of Human Intelligence, he writes (when concluding a section on the research results concerning the partial specialization of the two halves of the brain), “I think the most significant creative activities of our or any other human culture—legal and ethical systems, art and music, science and technology—were made possible only through the collaborative work of the left and right cerebral hemispheres” (Sagan 195).
And in that same book, Sagan references and engages with philosophical work by Plato, St. Augustine, Sigmund Freud, and Henry David Thoreau (among others). I have striven in this series to stress the need for mutual respect, mutual education, and even fruitful overlap between philosophy and science, and have upheld other individuals who endorse that confluence. Carl Sagan was one such individual.
Toward the end of The Dragons of Eden, Sagan engages briefly with the topic of the comprehensibility of the universe (in a passage from which I draw a lengthy quotation below). When I first read that part of his book, it occurred to me quite suddenly that Sagan, while not spot-on in my reckoning, was pointing toward a very promising low-level explanation for the seemingly remarkable notion that the fundamental physical laws strike us as mathematically simple—or at the very least comprehensible. In order to explain my interpretation of Sagan’s thought, I would like to first briefly discuss a closely related subject: the Anthropic Principle.