What do they call the cycle of government when it changes from like communisum to democracy to monarchy etc? ?

Question

What do they call the cycle of government when it changes from like communisum to democracy to monarchy etc? I remember reading about it and it looked like a circular flowchart. Im trying to find this circular flowchart to show someone what our democracy may turn into eventually.

Answer 1

I do not understand who "they" might be.

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