>>9108020
>>9108256
Hey, idiots.
They choose the best to be space marines, thus breeding space marines and having the space marine offspring duke it out with each other/other recruits would on on average produce better space marines. Since they do not do this, logically, space marines must be sterile.
That is of course following logic, so with this being 40k, that doesn't count for much. Maybe they're all idiots and don't know how evolution works? Maybe they're afraid of producing a space marine so great he'd outdo the emprah?
It actually kinda fazed me when I realized that they don't have kids at all, they could atleast take a few days after 1-200 years of service to sire a bunch of off-spring here and there on their recruiting worlds.
I mean, otherwise what they're doing is practically selectively removing the best genes from the genepool every generation, resulting in progressively weaker space marines.