Henry Parker (1604–1652) was an English barrister and political writer in the Parliamentarian cause. He was a major figure as a propagandist and pamphleteer, "the most influential writer to defend the parliamentary cause in the 1640s". He provided the "ideological ballast for resistance", according to Geoffrey Robertson. He operated on behalf of the "coalition" of aristocrats and gentry who took over in the Long Parliament. He formulated a theory of sovereignty for the side of Parliament in its conflict with Charles I of England, based on the consent of the people. উৎস: Wikipedia (en)