Board Thread:NF Noosphere/@comment-2089817-20150125051427/@comment-24750462-20150125052109

I think there were eras before WSP. Simply because if you look at the WSP, that was when Senju and Uchiha were at their strongest. I'm using the Uchiha as evidence here. It would have taken generations for the Rinnegan to devolve into the Sharingan, thus making it impossible for WSP to be immediately after Indra and Asura's battle.