I believe the answer is: Fertile Crescent
Fertile Crescent is a term that used to described a region where human civilizations could thrive due to its capability to sustain many agricultural products. In most cases, this region possess both soil with high amount of nutrients and located not far from a water source.
It was an agreement to treat christians nicely/fairly in the Roman Empire, rather than treating them poorly. It was later that christianity became the most popular religion there. Hope I helped :)
It is said that all the philosophy and knowledge used during the Renaissance era was held onto the Scoentific Revolution.
From what l can tell it looks good
If you have sperate governments it would be a chaos in my opinion. As they would have no power to raise funds, <span>to collect taxes, raise an army, or even regulate trade. </span>