Fair enough. I think copyright (and by extension intellectual property) is not all that important to promote the arts, and the actual implementation in the law is (in my opinion) very flawed.

In the modern age it costs nothing to duplicate knowledge. That should be reflected in law. I'd like to see society work towards making life in society better. One of the ways to do that is to give freely to society. If we recognize intellectual property at all (I'd rather we'd not) then the time to reverting to public domain should be significantly shorter.