Board Thread:Warhammer 40k General Discussion/@comment-69.143.134.163-20150419161351/@comment-68.54.204.244-20151201043829

My theory is that one associated himself with xenos (probably eldar because they piss off the emperor)  and another was a absolute pacifist. All the primarchs represent a aspect of the Emperor/humanity and his aspects of peace and multicultural are aspects that are the most logically missing from the primarchs