Board Thread:Naruto Discussions/@comment-28462219-20160527161832/@comment-28345910-20160614224033

MAMMAM787 wrote: I think it was lame that the rinnegan was the final evolution of the sharingan. They should have remained two independent dojutsu's that way the power scaling would have been more balanced out. I don't know why kishi decided to relate it to the uchiha It was for good reason as it was Hagoromo's eye to begin with and the Uchiha are just one half of Hagoromo's power. Not to mention that it makes perfect sense.

Not saying that every Uchiha can unlock it though if they just take DNA from an Uzumaki or a Senju, this is restricted to the reincarnations of Indra and Asura.