AT&T and UNIX
Universities paid for a lot of the work.
People at universities did a lot of the work.
Then AT&T aka Bell Labs insisted they 100% owned it. Thus was BSD and GNU born and later Linux Kernel.
To go extreme and suggest then that copyright shouldn't exist, and software, stories, music and images should be free would destroy the creation of them. The actual programmers, writers, musicians and artists should hold the copyright, not Corporations and not for more than a generation or two (25 or 50 years) after death. Not 75 or 90 or 100 years after death, and not cheating, like Disney does.
The Disney lobbying, increase of copyright terms and DRM hasn't benefited any creator or worker, only rich corporations.
The USPTO and US Government and big USA Corporations are the problem. Edison was one of the first to act like AT&T. Eventually his dishonest Cinema patents were invalidated. Far too late!