Modern-day science is a unique tradition of knowledge, inasmuch as it openly admits collective ignorance regarding the most important questions. Darwin never argued that he was "the Seal of the Biologists", and that he had solved the riddle of life once and for all. After centuries of extencive scientific research, biologists admit that they still don't have any good explanation for how brains produce conciousness. Physicists admit that they don't know what caused the Big Bang, or how to reconcile quantum mechanics with the theory of general relativity.