Few will doubt that humankind has created a planet-sized problem for itself. No one wished it so, but we are the first species to become a geophysica… - Edward O. Wilson

Piaget, who was originally trained as a biologist, views intellectual development as an interaction of an inherited genetic program with the environment. It is no coincidence that he calls this conception "genetic epistemology," in effect the study of the hereditary unfolding of understanding.

The naturalist is a civilized hunter. He goes alone into the field or woodland and closes his mind to everything but that time and place, so that life around him presses in on all the senses and small details grow in significance. He begins the scanning search for which cognition was engineered. His mind becomes unfocused, it focuses on everything, no longer directed toward any ordinary task or social pleasantry.

Primitive men are ecological analogs of lions, wolves, and hyenas... they have adopted pack hunting in the pursuit of big game. ...habitually slaughtering surplus prey, storing food, feeding solid food to their young, dividing labor, practicing cannibalism, and interacting aggressively with competing species. ...this way of life persisted for millions of years or longer and was abandoned in most societies only during the last few thousand years.