Act always so as to increase the number of choices
Either Stone Age man was a technological wizard, who carefully removed his technological achievements so as not to upset his inferior progeny, or our population dwindled from a once astronomical size to the mere three billions of today.
Something that cannot be explained cannot be seen.
If you desire to see, learn how to act.
Objectivity is a subject's delusion that observing can be done without him.
Cybernetics is NOT the banana.