Is this the Lemmy that is said to be less toxic than Reddit? Maybe it wasn't Subway, maybe it was something different. It was 10years ago, I may be misremembering the details.
Did I remember everything correctly? Dunno. Are you being a dick? That's 100%.
I think you may like Expeditionary Force series, there is quite a bit of what you are looking for.
I guess Asimov Foundation series would also be a good candidate for world building.