The Berne Convention - our copyright treaty
For those who have neglected to actually look it up, here it is: The text of the Berne Convention, the basis for the reason corporate giants go to WIPO rather than wasting their time in the U.S. legislature.
BERNE CONVENTION FOR THE PROTECTION OF LITERARY AND ARTISTIC WORKS (Paris Text 1971)
http://www.law.cornell.edu/treaties/berne/overview.html