"Rise and Fall, the first major expansion for Civ VI, makes bold moves to enliven the endgame, like introducing Dark Ages and “city loyalty” , which makes your

"Rise and Fall, the first major expansion for Civ VI, makes bold moves to enliven the endgame, like introducing Dark Ages and “city loyalty” , which makes your cities more liable to defect but also gives you a chance of phoenix-like rebirth into a Heroic Age. The intent is to inject that early game dynamism into established empires, encouraging them to, well, rise and fall." It's all biology. Empires grow and decline and die like animals. The leave offpsring. There is perpetual growth but it happens in a cycle. No empire "wins", it breaks down and the pieces then grow and compete.