You mean slave labor society right, if you can't expand the empire fast enough, you "human capital" stream dries up, its like taking on too much debt and not being able to keep up with paying.
I meant The Romans, started out as an agrarian culture where Ceasars were more interested in tending the farm than politics that evolved into the spectacle that Rome is now known for.
Not ready to drop a book on HN regarding the nuance of Roman evolution just yet.
Not ready to drop a book on HN regarding the nuance of Roman evolution just yet.