copyright is part of intellectual property.
Intelectual property is fair at theory because it gives author a personal monopoly over a creation FOR SOME TIME so he can profit from his creation but law was not created to overexpoliting (the work) and privating the public from it because the author used other sources to create his stuff and public has right to eventually use it too, so, it must be protected, but the truth is that law has been corrupted by corporations:
Problem is Big Corporations like Warner and stuff pay lobbys in all "wect" countries to increase the years of the legal monopoly, nowadays it's somethign so insane like 100 years AFTER the authors death(Mexico), it was only 20 years when original intellectual law was created.
I guess this happens in every wect country because International Laws
also Corporations make a lot(all) of their monies with Intelectual Property so they tend to concentrate more and more like Disney. They are leading humanity to a medieval era where no one can use cultural goods to create something new because everything "belongs to the corporations"
IMO 60's music(and all cultural copyright) and even some of the 80's is already on public domain ,but truth is you'll go to jail if you use it without permission because Corporations want to exploit those creations for eternity, something absurd tbh.
checkout Mickey Mouse Liberation Front and stuff.
tl;dr
Intelectual property is good but only if author can profit for a FAIR amount of time, I would vote for 10 year.
that would apply to ALL intelectual property.
we need stuff to flow, life finds a way !