You're free to release your own work with Creative Commons License (or any other license that shorten the copyright).
> Copyright is a monopoly that the government creates on purpose
Creative work takes a lot of effort and resources (ex: movie production, games, books (hello Knuth)) and can be easily copied/imitated in a digital age.
It you think copyright should be shorter to everyone, then inheriting something valuable shouldn't be a thing as well?
> It you think copyright should be shorter to everyone, then inheriting something valuable shouldn't be a thing as well?
inheritance has nothing to do with copyright. Financial assets are not monopolies. Copyright is only a valuable asset because of the granted monopoly on copying/distribution.
Therefore, to reduce the value copyright has (as it currently does seem to have too much), reducing the granted terms should be sufficient. Like patents, a good 20 years seems like a sufficiently long time to recover cost of production, while letting people who are currently alive to produce derivatives of it afterwards.