Nobody asked but …
The powers of reason that the species of human has are undoubtedly rudimentary. We are, as far as we know, the first recorded species to be endowed with the ability to deal with symbols and logic. We should be able to solve most problems, particularly those arising through war, poverty, irrationality, and malfeasance. But the scroll of history shows the contrary. We have little to boast of in any of these areas. So far, human behavior is dominated by instincts and emotions.
Obviously, a positive assessment of our evolutionary grade by virtue of rationality would require much more reasonable action and far less behavior motivated by baser instincts.
— Kilgore Forelle