Silver Age of The Forge
War in space is illegal so we have to get better at war on the ground and also we're getting weird about not having seen the gods in a while and also our history was figuratively erased by all those fascists and literally erased by REDACTED so we're having a weird time coming to grips with the place religion has in our lives and we think we'll just become monks and then immortal about it. This will make us better at math.
We still do war in space a little bit but people get mad about it on account of it being against the law. If you do a psychic wizard battle between navigators followed by a boarding action and normal fighting inside a ship people don't get quite as mad even though that's technically illegal. Just don't shoot at disks and stuff and you'll probably be fine.