"but, really, it wasn’t new. That’s what justified the entire history of human caste societies, of feudalism, of empires. Some people had “noble” blood which meant they were superior, and their moral duty was to exploit the “peasants,” who had inferior blood."
Here's another mistake, not recognizing genes. It's understandable, because looking at it that way has been used to justify some of the worst wars and behaviors in history. But it's true. Nature isn't fair and doesn't care. People are not genetically equal. Some have greater genetic gifts than others... But modern technology can allow people to husband their genes so that their children get the best genes from both parents. Nature cannot do that. Everyone could have the genetic gifts of brains, health and beauty. Genetics are unloved but they are at the bottom of the story. We can replace the brutality of nature with the creativity of human thought.
As for learning it, yes, its incredible value must be learned or it will not be preserved but it's not just about the advantages of technology and democracy. It is also about the contrast between the "red of tooth and claw" of nature's win-lose systems verses the potentials of win-win human systems like democracy and cooperation. If the instinctive foundations of blind competition verses cooperation of human instinctive strategies are not understood and remembered, the choice between them will not be made and we will revert to the more common natural strategy of blind, mindless, destructive competition.
It's not just that we need to think about the future. We need a vision of the future to serve as a goal and target. We need it to provide hope and idealism. We need a path to it that can be followed. I hope that the first partt of it is described in "Genetics For A New Human Ecology". Search for that on Amazon or see the older version on YouTube. The Second part is "Strategy For A new Human Ecology" which I wrote but did not have the knowledge to complete... then.
Genetics For A New Human Ecology (Transition)