“No single human being knows how to build a computer from scratch.” The fragility of cultural knowledge and ideas about how to preserve it are captured in this very accessible chapter from the Handbook of Human Computation:
Of course this is true, but also no one knows how to make even a simple pencil from scratch. https://fee.org/resources/i-pencil-audio-pdf-and-html/
Economics is about how we cooperate with millions of other people to achieve ends. And the amazing thing about the modern economy is that it generates this cooperation without a dictator or mastermind.