Board Thread:Warhammer 40k General Discussion/@comment-14745711-20140911102114/@comment-25177957-20140916051420

Some of the eldest Daemon Princes such as Doombreed were humans during their mortal lives. There are no Eldar Daemon Princes that exist within canon. Why this is this case is unknown. However, humans are more easily corrupted by Chaos. The Eldar were unwittingly feeding Chaos with their actions, while Humans throughout history turned to worshipping Chaos on purpose. And furthermore, Nurgle, Tzeentch, and Khorne all gain almost nothing from the Eldar. Khorne might be appeased at the actions of an extremely rare Khornate Ork Stormboy freebooter. But it's mostly human blood, human tears, human pleasure, and human sorcery that feed the Chaos Gods. It's corruptability that matters lots when we come on terms of feeding Chaos. The Emperor recognized that Mankind was at the greatest threat by Chaos.

Nurgle is defenantly the oldest, Tzeentch seems like a younger god than Khorne yet older than Slaanesh by a decent margin. Ever since non-shaman/Emperor psykers came into being, Chaos became considerably stronger, as if another Chaos God were born, and the Men of Iron for some mysterious reason had rebelled (A.I probably had never rebelled before the end of the Dark Age of Technology) and it was probably one of Tzeentch's greatest and perhaps first schemes and plots, for surely Tzeentch would have manipulated mankind more had he been around longer.