Why are the Legions numbered so?

[Captain Idaho]

Well using the original statement here, with the 8th being a failed experiment where the 13th succeeded, the problem is the genetic predisposition of the 8th has nothing to do with law. The 8th were bullies, murderers and "free spirits" before focusing on justice or anything else. That' law aspect was purely personality, twisted as it was, of Curze and did not instil genetically into his sons.

 

The genetical tendency of Guilliman to "obey" or conform or order is closer to Lorgar's Legion, who had a tendency to obey blindly their Primarch.

Edited October 22, 2022 by Captain Idaho