This was already tried numerous times throughout history. It is beyond me why would someone think civilization states may work in this day and age. “Civilised” or not, a state is as good or bad as the relationships it maintains with its own people and its neighbors.

#Culture is what every tribe and community developed to affirm its sense of #identity. Some cultures established #states with clear #borders that further nurtured their cultures (and) were led by “men of prowess”: chiefs or priests, princes or kings, even emperors.
#Civilization began with the idea that the “civilized” had to confront the “barbaric.” Men of vision set out to find meaning in life beyond their own borders. They ranged from prophets and teachers who inspired those with wealth and power to spread their message to everyone.

https://www.noemamag.com/modernizing-ancient-civilizations-for-todays-planetary-challenges