The biggest issue with Grid is that they have to get along with the Beastmen because they have TWO PRIMALS (Three if Odin decided to go on a rampage) that can be summoned at any given time if someone pisses off the Moogles or Slyphs. Grid also has to keep lesser problems like poachers and Garleans from provoking the beastmen causing a bigger issue. Out of all 3 city-states Grid is actually in the worse position of being destroyed.