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The only reason why copyright exists is for the benefit of society.

If copyright is ever used to the detriment of society, an adjustment is in order.

At what point in history would you say patent laws became beneficial to society? Patent law was created as a way for oligarchs to maintain economic power over their subjects[1], and it is still used as such[2].

[1]https://en.m.wikipedia.org/wiki/Patent_roll

[2]https://en.m.wikipedia.org/wiki/Patent_troll

Patents represent a deal: You publish specifications, and society will grant you exclusive use for X years. Thankfully, unlike their copyright cousins, patent laws have not seen an increase in X. This serves to prevent knowledge from being locked away as trade secrets.

Beneficial to society? Drug companies have patents, and patents expire. Upon expiration, generics become available because the synthesis of the drugs is public knowledge, which creates a competitive market and lowers the price.

Without patents, the drug companies could (modulo other regulations) keep synthesis of their chemicals a trade secret, which may not be replicable in a reasonable time-frame.

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