Why, when we are so worried about preserving freedoms, do we prohibit choice on the part of downstream users as to how they can license derivatives works they make? Why don’t we want to protect that user’s freedom to choose how to license his derivative work, into which he put substantial effort? The copyleft approach of both the Free Software Foundation and Creative Commons makes creators of derivative works second-class citizens. And these are the people we claim to be primarily interested in empowering. I can’t stress this point enough: the ShareAlike clause of the CC licenses and the CopyLeft tack of the GFDL rob derivers of the basic freedom to choose which license they will apply to their derived work. ShareAlike and CopyLeft privilege creators while directing derivers to the back of the bus.