The Cave Man Principle

The Cave Man Principle is Michio Kaku’s most useful idea for thinking clearly about artificial intelligence, and one of the most widely applicable in the [YOU] on AI cycle. The principle is simple: modern humans emerged in Africa roughly a hundred thousand years ago with the cognitive architecture, emotional repertoire, and social instincts suited to small-band savanna life, and those structures have not meaningfully changed since. Technology has changed at exponential rates; the brain evaluating technology has not. The consequence: whenever modern technology conflicts with the desires and threat-detection systems of our Pleistocene ancestors, the ancestral systems win. We need to look a person in the eye before trusting them with money, health, or life-altering judgment—not because this is rational in every context but because the caveman could not have survived otherwise. We fear the predator in the grass and fail to fear the