>>9389089>I thought it was about the progress of human civilization
It is. The show is about what it means to truly progress. The younger generation surpassing the old, and steps taken to insure true progress, and not just mindless development into inevitable extinction. The beauty of it all comes from the way it's presented in the story.
The business with Nietzsche is nothing more than drawing parallels to observations. It exists, whether it was intended or not, but it's not really the point.