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It must be admitted that there is a degree of instability which is inconsistent with civilization. But, on the whole, the great ages have been unstable ones.

必须承认，有某种程度的不稳定是与文明不符的。但是，总的来说，伟大的时代是不稳定的。

— Alfred North Whitehead 阿尔弗雷德北怀特黑德