For people, being idle with a full belly is quite a frightful thing, because they tend to create all sorts of tasks for themselves, eventually causing turmoil and upheaval, leaving no other option but to tear everything down and start anew.
Therefore, a power, an organization, must have an enemy, a rival, to redirect conflicts outward, ensuring internal stability.
During the Heaven Martial era, Great Zhou was continuously expanding its borders, achieving true unification under heaven.
But what after unification under heaven?
Conflicts still had to be resolved, demands still had to be stimulated, otherwise, internal chaos would be inevitable, especially since Martial Artists are extraordinary, brimming with energy. If you don't give them something to do, they will find something to do for you.