Through most of human history, our ancestors had children shortly after puberty, just as the members of all nonhuman species do to this day. Whether we like the idea or not, our young ancestors must have been capable of providing for their offspring, defending their families from predators, cooperating with others, and in most other respects functioning fully as adults. If they couldn't function as adults, their young could not have survived, which would have meant the swift demise of the human race. The fact that we're still here suggests that most young people are probably far more capable than we think they are. Somewhere along the line, we lost sight of – and buried – the potential of our teens.
Our current education system was created in the late 1800s and early 1900s, and was modeled after the new factories of the industrial revolution. Public schools, set up to supply the factories with a skilled labor force, crammed education into a relatively small number of years. We have tried to pack more and more in while extending schooling up to age 24 or 25, for some segments of the population. In general, such an approach still reflects factory thinking—get your education now and get it efficiently, in classrooms in lockstep fashion. Unfortunately, most people learn in those classrooms to hate education for the rest of their lives. The factory system doesn't work in the modern world, because two years after graduation, whatever you learned is out of date. We need education spread over a lifetime, not jammed into the early years—except for such basics as reading, writing, and perhaps citizenship. Past puberty, education needs to be combined in interesting and creative ways with work. The factory school system no longer makes sense.