User blog comment:Supahbadmarine/By Tzeentch! Here We Go!/@comment-25033299-20130211071701/@comment-3258762-20130211194300

Just an over-simplification of the Astartes, Supah :3

I know it was not like that, obviously, but I always got the feeling that the Astartes was some afterthought for the Emperor, like some minor replacement for the Primarchs.