中共、蔣介石政權等，做得到：
"Every record has been destroyed or falsified, every book has been rewritten, every picture has been repainted, every statue and street and building has been renamed, every date has been altered. And that process is continuing day by day and minute by minute. History has stopped.”
--from NINETEEN EIGHTY-FOUR by George Orwell
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Epidemics and pandemics can cause large-scale levelling. Total revolution, of the Russian or Chinese sort, also fits the bill
