I think, for the first time, we can draw a direct line of lineage from today to the universe of 40K!
From the description section for Black Crusade we have:
I swear to make war on the Imperium and its people, and I will go to my grave tearing down the walls of that benighted, decadent, and foolish empire. It is not I, in the end, who have betrayed the Imperium; it is the Imperium who has betrayed me. It is the Imperium who has betrayed us all.
– Commander Phineas Gage, Master of the Voidborn Deserters
He would appear to be a direct decendant of THIS Phineas Gage !!!
Mayhap that rail spike to the head started the chain of events that led to the fall of man?!