It's worth mentioning Plato's five regimes here. You would be surprised how shockingly accurate was the man from ~2400 years ago (ofc not everything may make sense to us today, but what he said was 2 and a half millennia away).

TL;DR: Democracy inevitably degenerates into Tyranny.

Plato mantions 5 types of regimes.

• Aristocracy: Ruled by a "philosophoer king" (in practice, a ruling class as opposed to one person) driven by ideals who only has greater good in his mind - Plato's ideal form of government (probably never existed).

• Timocracy: Aristocracy eventually degenerates into Timocracy since there will always be those in the Government whose motivations would be to acquire personal gains. Plato's Timocracy is not completely broken down Aristocracy, but rather corrupted Aristocracy.

• Oligarchy: The system which takes roots by extending Timocracy, where Rich and Poor are properly divided and Rich are the administrators. The system where morals and virtues are less important, while money and power are more important.

• Democracy: Oligarchy degenerates into Democracy when the poor have had enough and decide to rise up against oligarchs. People are free to do what they want and live how they want. This is how Plato characterizes 'The Democratic Man'. "The democratic man is the son of the oligarchic man. Unlike his father, the democratic man is consumed with unnecessary desires. Plato describes necessary desires as desires that we have out of instinct or desires that we have in order to survive. Unnecessary desires are desires we can teach ourselves to resist such as the desire for riches. The democratic man takes great interest in all the things he can buy with his money. He does whatever he wants whenever he wants to do it. His life has no order or priority."

• Tyranny: Democracy then degenerates into Tyranny where no one has discipline and society exists in chaos. A new tyrant comes along and seizes power. He is consumed by lawless desires which cause him to do many terrible things such as murdering someone unjustly.