"This is because Wikipedia was created before CC came on the scene, and therefore – quite reasonably – used the best existing open content licence, the GNU Free Documentation Licence (FDL), which is not compatible with popular CC licences. As the man who did more than anyone to craft the latter, Larry Lessig, explains:
""A fundamental flaw in the Free Culture Movement to date is that its most important element -- Wikipedia -- is licensed in a way that makes it incompatible with an enormous range of other content in the Free Culture Movement. One solution to this, of course, would be for everything to move to the FDL.
""But that license was crafted initially for manuals...""
