Board Thread:Warhammer 40k Novels/@comment-27376167-20151210113237/@comment-26420219-20160416103913

especially if the two lost primarchs wholeheartedly turned their back on the Imperial cult, and its notion of a universe populated soley by mankind even though there truly is other intelligent life out there. These primarchs may have felt that mankind could learn from, & perhaps eventually even trade with these intelligent Xenos. Again, you’re messing up the timelines. The creation of the Primarchs dates back to a time where there was no Imperial Cult, but where the Imperium still followed the Imperial Truth. While GW is rewriting some of 40K’s history, most tellingly through the Horus Heresy related material, you on the other hand are venturing in another terrain, and seem not to have considered the informations from the Lost Primarchs page that is considered canon. All hints indicate that the matter of the Lost Primachs was resolved or at least buried during the Great Crusade with several clues that one Primarch and his Legion had to be destoyed and only the truly lost Primarch would still be unaccounted for. While this does not exclude any kind of xenos interference, the Tau seem an almost impossible match.

The essential point remains the same : the Tau were not initially part of the W40K universe and were only added later on during the mid- to late 90s. If you compare the Tau to the new races of the same time -Tyranids and Necrons - one is from an entirely different galaxy and the second are older than the entire W40K universe; in that sense Tyranids and Necrons are outside the timeline. On the other hand the Tau were destined to be the new-comers, they originated from the same galaxy and are thus part of the time continuity of the W40K universe. Cannon material states that intelligent life did not exist on T’au before the 35th Millennium. Your theory implying that a M30-born Primarch could in fact have manipulated or moulded the evolution of the Tau hence seems too far-fetched.

You disregard some important facts: the timeline, the mechanism of psychic powers, the existence of a Primarch and his Legion for 5 000 years before the Tau were even created, communication problems and I could go on. While every one may suggest his theory on the forums you should also be ready to accept criticism from other users.