Board Thread:Warhammer 40k General Discussion/@comment-7699236-20150618150629/@comment-8881468-20171017210131

To dig up some lore around this:

"More than once i have questioned the emperor's wisdom in bestowing his gifts upon but one half of the human race." Fabius Bile in Primogenitor by Josh Reynolds

We got the Dorn/Malcador discussion in Scars

We got

Index Astartes 1 and Horus Heresy Betrayal both with

The process of creating a space marine is tied to the human male