What if the evolution of man was planned? What if the very apes of our ancestry were merely conducting an experiment into evolution? Is it not possible that as conscious beings on the dawn of evolution, a portion of the ape race diverted from the tribe to breach more extreme habitats in search of a greater understanding. With not so much as a control variable we may have embarked on one of the strangest journeys possible, the journey to another species.
Could returning to a "primitive" state be what scientists have sought since the discovery of the homo sapien/sapien. Are WE the missing link, merely on an elongated road to a higher intelligence and back? If we weren't meant to de-evolve why then, for tens of thousands of years have we kept instinct and primal urges. It's a predisposition for survival, especially since we'll drop a few notches in the food chain.
Imagine a world of gigantic trees with crops and free range animals, lakes and streams. All overlooked by tree top cities made of huts, accessible by vines and branches. Medically and socially advanced, able to communicate, travel and comprehend beyond our primate cousins, (that is unless the apes are just playing dumb, while observing our every move).
By the by, I have absolutely no basis for the hypothesis above. Then again thats all it is, a hypothesis. If i can call it that.