Calamity Mage

"Whether it's humans, elves, or druids, we're all doing pretty well now. I mean, the structure of a city-state is also very good. People don't disturb each other, so why must we form a kingdom?"

Matthew did not answer immediately.

He looked at Rheagar.

The latter's expression was also very serious. He actually took the initiative to say,

" In terms of social organization, a kingdom that can control more city-state resources at the same time will be a more advanced, risk-resistant, and powerful existence than an independent city-state. I've travelled to other worlds, and many of their places are indeed more developed than ours. The simplest and crudest example is that if a kingdom composed of multiple city-states declared war on an independent city-state, the latter would almost certainly lose."

Matthew nodded in agreement.

"We all know the principle of strength in numbers.