>A monarchy of genuinely good rulers is a better government than a democracy, but it's hard to ensure a good ruler because whoever gets chosen, there's always a risk they're corrupt. Democracy gives the people more of a chance to prevent bad laws than a monarchy, even if it's a small chance.
No, this isn't the problem with monarchies at all (or maybe I'm just disagreeing with your wording). The problem with monarchies is heredity: sure, you can get a great ruler like Marcus Aurelius, but the problem is the great ruler doesn't live forever, and eventually he dies (or is secretly murdered) and this his shitty son takes over. Then the Praetors have to murder him in his bathtub before he completely destroys the empire.
No, this isn't the problem with monarchies at all (or maybe I'm just disagreeing with your wording). The problem with monarchies is heredity: sure, you can get a great ruler like Marcus Aurelius, but the problem is the great ruler doesn't live forever, and eventually he dies (or is secretly murdered) and this his shitty son takes over. Then the Praetors have to murder him in his bathtub before he completely destroys the empire.