> Governments are a reflection of the people. They're not some nebulous, abstract entity; they're literally made and run by people of each country. They're chosen–or in some cases imposed–to represent the people to the world. Even in dictatorships, it is the people that choose for governments to remain in power. When that stops being the case, governments are overthrown, and a new set of people take power.

This seems closer to the mandate of heaven[0] than an explanation of how governments work or why they are overthrown.

Here's another explanation based on The Dictator's Handbook: Why Bad Behavior is Almost Always Good Politics by Bruce Bueno de Mesquita and Alastair Smith. The 18 minute video The Rules for Rulers[1] has a great summary of the principles from this book.

Dictators and elected representatives have the same problem; they must keep control of key supporters and reward them in order to remain in power.

Dictatorships have only a few key supporters - heads of the army, secret police, treasury, etc. Popular support isn't required; if these people are content with your rule, you will remain in power. If they aren't, you will be replaced.

Democracies have many more key supporters; we normally call them voting blocs - suburban voters, Hispanic voters, non-college voters, evangelic Protestants, etc. Popular support from these groups is required and this difference is why democratic governments change between parties so often.

[0] https://en.wikipedia.org/wiki/Mandate_of_Heaven

[1] https://www.youtube.com/watch?v=rStL7niR7gs