Ok, I could put this whole post in a spoiler, but not really a nice way to start a new thread. Instead I shall say here and now if you read on and haven't read Legion, Descent of Angels and Fallen Angels then you may learn stuff you would call spoilers. So stop reading now to avoid them

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In another thread this was touched on and didn't want to derail the whole thing towards specifically the
DA aspect so creating this one.
The Cabal in Legion are stated as judging the
DA to have too much "inherant corruption" and in another thread the gene seed was suggested as the problem.
But as the
DA have one of the purest (possibly the purest) geneseed, think said in their codex that is ruled out. So wondering where people believe this corruption stems from. Obviously what Caliban was and how riddled with warp energies it could be said to have been may have influenced this, perhaps the leadership of the Lion or Luthers influence. But could the legion have not been approached before Caliban and the leadership and its course altered? Was the taint just because they are the genetic sons of the Lion and the geneseeds quirks and therefore Legion "personality" made them corrupt?
And yes, UM genestock is also viewed as pure, why
DA wouldn't have spawned many chapters since background wise I believe would stem from the "if it isn't broke, don't fix it, or try to improve it in ANY way" mentality in the
IoM. UM stock made most of the 2nd founding, go them
So
DA and their corruption, was it the Lions gene code? Calibans influence upon the minds of the marines who followed the Terran stock? The Lion himself, or something else, what are peoples thoughts?