And the best way to preserve it is to maintain a vested property right to the creator or his heirs or assigns.
Just because something expires into the public domain is no guarantee that it will be lost to future generations. But if the succeeding generation has a profitable reason to preserve something it is more likely to be preserved.
In what way have you been deprived of your Liberty because someone still has a copyright on The Cat in the Hat?
In what way have you heen deprived of your liberty if you have to fill out paperwork and file a fee to maintain copyrights or trademarks?
Your shrill avoidance of even miniscule responsibility being part of receiving a benefit is childish.
You are not defending a right. You are demanding to be free from responsibility. There is a difference.