"If the basis of a popular government in peacetime is virtue, its basis in a time of revolution is virtue and terror -- virtue, without which terror would be barbaric; and terror, without which virtue would be impotent." [Robespierre, speech in French National Convention, 1794]General sense of "systematic use of terror as a policy" is first recorded in English 1798.
"Lydford law: is to hang men first, and indite them afterwards." [Thomas Blount, "Glossographia," 1656]
"Strictly speaking, conservatism is not a political system, but rather a way of looking at the civil order. The conservative of Peru ... will differ greatly from those of Australia, for though they may share a preference for things established, the institutions and customs which they desire to preserve are not identical." [Russell Kirk (1918-1994)]
Phrases such as a conservative estimate make no sense etymologically."... in the spring of 1834 Jackson's opponents adopted the name Whig, traditional term for critics of executive usurpations. James Watson Webb, editor of the New York Courier and Enquirer, encouraged use of the name. [Henry] Clay gave it national currency in a speech on April 14, 1834, likening "the whigs of the present day" to those who had resisted George III, and by summer it was official." [Daniel Walker Howe, "What Hath God Wrought," 2007, p.390]Whig historian is recorded from 1924. Whig history is "the tendency in many historians ... to emphasise certain principles of progress in the past and to produce a story which is the ratification if not the glorification of the present." [Herbert Butterfield, "The Whig Interpretation of History," 1931]