Well we know that sin was created by Yevon,during the war between Zanarkand and Bevelle,but who was Yevon?
I think we was from Zanarkand,because Zanarkand is the land of the Summoners,and i think that he created sin to destroy Bevelle,in retaliation of the destruction of Zanarkand,that is revealed later in the game that was destroyed by Bevelle and not by Sin .So what happened?did the creation of Yevon go wild and start destroying everything ?And who was the first Sin. Since lady yunaleska did the first final summoning who was the first Sin?
And could the Al Bhed be people from Bevelle,that get exiled by the fist's Yevon Priests?