This book is not about republics. It's about monarchies—how to get 'em and how to keep 'em.
So remember those old monarchies, the ones where the kids become the new ruler? Those are a piece of cake to rule. Unless you are a total idiot, you can't mess up this sweet deal.
Even if other people invade, you'll probably get your power back once they have any kind of trouble because the people love you. Come on, they watched you in your royal, diamond-studded diapers—how could they not? Dynasties are pretty chill, but upheavals? That's another story.