Me and my friend reading back through the manga and i was I always did wondering about the beginning Konoha, though - particularly the second Hokage. I mean, isn't it slightly odd that this guy developed Edo Tensei in the first place? I can't imagine any shinobi capable of a jutsu on that level who wouldn't predict that the jutsu would become forbidden; it was an abomination of ninjutsu. So why did he develop it, and why did Madara know how to release it? Im starting to think that madara and the second hokage had something to do with each other.