Back at the start of the human adventure, the sole function of the visions was to enable people to engage directly with the universe, with one another, and with their own inner nature. That kind of engagement had definite practical results. It could make a small group of hunter-gatherers more efficient, more mutually supportive, and more able to tap into their shamanistic powers. But it was never intended as a method of mundane problem-solving.
Mature visions, in contrast, are intensely focused on problem-solving. This gives them the ability to change the world, but only at the cost of falling out of touch with their intuitive and experiential side. They lose their nearly magical ability to synchronize human efforts, and their mystical origins are either forgotten or reduced to rote formulas.
The first mature vision came into being shortly after 200,000 years ago, when the human community was faced with a prolonged ice age that posed a threat to their very survival. As everything they had previously relied upon failed them, they lost faith in the old, instinctual ways. They turned instead to their one remaining ace in the hole — the transformation vision — and began using it as a guide to reshape the world around them.