Except that E. O. Wilson was an immense group selection skeptic until his 80s, when he decided he was wrong and threw in with D. S. Wilson's ideas (sometimes called "neo-group selection"). See D. S. Wilson and E. O. Wilson, Rethinking the Theoretical Foundation of Sociobiology, 82 Q. Rev. Bio. 327 (2008).

It's not like this is his own pet theory and he's trumpeting it out of ego. If anything, it demonstrates humility about his earlier dismissiveness.