text:  On one level, it was Mao Zedong trying to re-establish control of the Communist Party by getting rid of his colleagues who were trying to undermine him. So it was a simple tale in that respect. But the way he did that was to use young people. He unleashed young people, essentially, to destroy the whole of society as it existed at that moment. And if you can imagine a society in which everything was upended, order, authority, even common sense...