From this fundamental difference between the view held by history and that held by jurisprudence, it follows that jurisprudence can tell minutely how in its opinion power should be constituted and what power—existing immutably outside time—is, but to history’s questions about the meaning of the mutations of power in time it can answer nothing.
There are no more uses of "mutation" in the book.
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Most mutations are harmful.
Radiation is less dangerous after child-bearing years since mutations are no longer cumulative to the next generation.