Quote Originally Posted by Tyreal View Post
It's been hinted at previously that Naruto is somehow related to the Senju clan which was (according to what we've been told) descended from the elder son of the Sage of Six Paths. The Uchiha clan was also supposed to be descended from the younger son IIRC.
I think it's the other way around: Uchiha = Older | Senju = Younger.
He put the younger in charge after his death and the older brother didn't like that so much.