Entropy, which requires active effort to prevent and reverse. Machines rust. Bridges crumble. Food rots. Similarly, societies decay into fascism (or something similar). Preventing this decay requires actually holding leaders accountable, and replacing them if they’re not serving the people.

Think of governments / economies as machines, and the components of those machines are people. If a spark plug in your car isn’t sparking, you replace it. If your governor goes to cancun when your state freezes, you replace him.

In theory, it really shouldn’t be this hard.