The theory by Erik Hoel states that: We're not maximizing the potential of the world's most gifted individuals because we're not educating them the right way. In the past, geniuses did not go to school; they were tutored — getting most of their education at home, for a single person (or a small group of people).

The answer, I think, is what it almost always is: that inventors are simply extremely rare. People can have all the incentives, all the materials, all the mechanical skills, and even all the right general notions of how things work. As we’ve seen, even Savery himself was apparently inspired by the same ancient experiment as everyone else who worked... See more