Now the Disney Corporation could do this because that culture lived in a commons, an intellectual commons, a cultural commons, where people could freely take and build. It was a lawyer-free zone.
It was culture, which you didn't need the permission of someone else to take and build upon. That was the character of creativity at the birth of the last century. It was built upon a constitutional requirement that protection be for limited times, and it was originally limited. Fourteen years, if the author lived, then 28, then in 1831 it went to 42, then in 1909 it went to 56, and then magically, starting in 1962, look — no hands, the term expands.
Eleven times in the last 40 years it has been extended for existing works — not just for new works that are going to be created, but existing works. The most recent is the Sonny Bono copyright term extension act.
Lawrence Lessig