18th
The human body’s physical “fight or flight” response evolved to help it evade a dangerous situation, which historically involved extreme physical exertion. The rush of steroids into the bloodstream essentially turns off unnecessary systems, including some higher thinking processes, to aid in escape. Unfortunately, as we’ve evolved into more intelligent beings, that response hasn’t evolved along with us. The stress response is still optimized to prepare for a short period of extreme physical exertion, not for increased mental clarity.
Interesting article from Dustin Curtis.