Portrait of Sidney Algernon on the frontispice of the French translation Discours sur le gouvernement (Discourses Concerning Government), The Hague, 1702. Algernon Sidney or Sydney (14 or 15 January 1623 – 7 December 1683) was an English politician and member of the Long Parliament. A republican political theorist, colonel, and commissioner of the trial of King Charles I of England, he opposed the king's execution. Sidney was later charged with...
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