That's an overgeneralization. Democracy is not a new invention, it was theorized and implemented back in Athens in 5 BC. If it took 100 years to fall apart, it

That's an overgeneralization. Democracy is not a new invention, it was theorized and implemented back in Athens in 5 BC. If it took 100 years to fall apart, it would already have fallen apart. A pure democracy doesn't scale well and so requires some corrections to be implemented in the real world. If anything modern technology has accelerated the corrections required to sustain a government based on liberal democracy principles. Also I'm not sure what makes you think that China is not ruled by mob mentality. I would argue that propaganda and censorship, which is the foundation of a communist government, is more likely to produce mobs. While classical communism might not have a strong opinion on information censorship, China's modern communism is strongly for censoring speech as well as information.