It was more than just a joke. It was a satire on England and 1980's society.
The "Imperium," which is led by the possibly-dead body of a entombed demi-god, sustains its control over the galaxy with a mix of intense faith, authoritarianism, and a massive space navy with marine shock troops.
That's England! The Imperium is the British Empire. The dead-God Emperor is Jesus and the Imperial Cult is the COE. The Imperial Navy is the British Navy and the Space Marines (who in the older versions were just common criminals, not super-soldiers), are the British Naval Marines.
One of the old slurs against Christians was that they followed a "corpse-god." They say the same thing in 40K.
Plus, all the rampant materialism, corruption, stratification, militarism, promoted and encouraged by the Imperium. All straight out of 1980's society.
> One of the old slurs against Christians was that they followed a "corpse-god." They say the same thing in 40K.
Seriously? Wow. Maybe it's because I'm American, but I can't imagine actually saying that to someone. I'd sorta expect them to throw hands if I talked like that about Jesus.
And I'm an entirely secular, non-Christian atheist living among many other such people!
> It was more than just a joke. It was a satire on England and 1980's society.
Well... while I buy that to some extent, I think the point is oversold. While there are absolutely satirical aspects to the early game[1], they're mostly limited to puns. What (original) 40k is absolutely not is subtle highbrow comedy. It's a bunch of drunk nerds guffawing about whatever they thought was funny in the moment.
[1] Which again, didn't actually include a lot of the later lore. Like, the emperor in the 1e rules was entombed but strongly implied to be actively leading the empire. Likewise the original conception seems a lot closer to dystopian sci fi than "1980's society" to me.