Of all the creative work produced by humans anywhere, a tiny fraction has continuing commercial value. For that tiny fraction, the copyright is a crucially important legal device.
~ Lawrence Lessig
Of All the Creative Work
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Airplanes and computers were pretty creative works. They seem to have retained their value well.
Patents are useful protecting those kinds of creative works.
Trade Secrets and NDAs, too.
If you want to see an angry farmer just say ‘John Deer’.