Evolutionary part of the brain to always be looking for obstacles or issues with what's happening in the moment. Clearly humans who were more laissez faire, got

Evolutionary part of the brain to always be looking for obstacles or issues with what's happening in the moment. Clearly humans who were more laissez faire, got eliminated either by nature or society. Same here. Aerobic exercise, as a long exertion, probably activates some part of the brain that quells it.