Board Thread:Warhammer 40k General Discussion/@comment-14745711-20140911102114/@comment-14745711-20140915095236

No they haven't. Khorne was born in the middle ages, Slaneesh was created when the Eldar fell, Nurgle and Tzeentch, well we don't really know. Nurgle is really old we know, it is possible he existed all the way back when the Necrontyr were around (would make sense since the Necrontyr were eternally plagued by, well, plagues). Tzeentch's origin is unknown by his very nature however, there is just no way of being certain.