Beckham, honestly, might not be a genius in the usual sense, but he's got some sort of genius nonetheless. He's parlayed his way to £500m nett worth. He's also the Oedipal escapee: the one properly of that fascist lickspittle United generation who also properly fell out with Ferguson.
My diagnosis is that Ferguson must've been an absolute nutter far beyond our ken. This would help to explain his outstanding success, the bizarre symptoms and deficiencies of these star players he fostered (Ronaldo another, of course), and the special pathology he's left behind at United.