This poster tends to think that the human brain may be to humans what the saber teeth were to the famous, extinct tiger. It is a biological development that has itself become an impediment to further existence. 'We' don't understand how to apply our mental capacities in order that the most consistently constructive results derive. The tendency is to seize upon whatever used to be the standard as being perpetually positive. Tiny example: it used to be imperative to carry water with one. This led to containers, which led to one-use containers. The 'good' was having convenient hydration available. The 'thoughtless' was the evident fact that when everyone copied this, the one-use containers would be impossible to contain. No moralizing here, just showing how things went and how they should have gone if our race had used the brain for what it is worth. Are we doomed to continuing to use the brain in excess of our power to control ourselves, thus sooner or later eliciting extinction from the universe?