All the stock words of political controversy, in spite of having a definite dictionary meaning, have in use meanings which differ according to the political affiliation of the speaker, and agree only in their power of rousing violent emotions. The word "liberty" originally meant chiefly absence of alien domination; then it came to mean restrictions of royal power; then, in the days of the "rights of man," it came to denote various respects in which it was thought that each individual should be free from governmental interference; and then at last, in the hands of Hegel, it came to be "true liberty," which amounted to little more than gracious permission to obey the police.
Source: Bertrand Russell: A Plea for Clear Thinking(1947)
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