Whiggism, sometimes spelled Whigism, is a historical political philosophy that grew out of the Parliamentarian faction in the Wars of the Three Kingdoms. The whigs' key policy positions were the supremacy of Parliament (as opposed to that of the king), toleration for Protestant dissenters, and opposition to a Catholic (especially a Stuart) on the throne. After the huge success of the Glorious Revolution of 1688-1689, Whiggism dominated English and British politics until about 1760, although in practice it splintered into different factions. After 1760 the Whigs lost power, apart from sharing it in a few short-lived coalitions, but Whiggism fashioned itself into a generalized belief system that emphasized innovation and liberty and was strongly held by about half of the leading families in England and Scotland, as well as most merchants, Dissenters and professionals. The opposing Tory position was held by the other great families, the Church of England, and most of the landed gentry and officers of the army and the navy.

Whigs who opposed Walpole often called themselves "Old Whigs" and comprised part of the Country Party.

Whiggism referred originally to the Whigs of the British Isles, but in its "Old Whig" form was largely adopted by the American Patriots in the Thirteen Colonies. American Whiggism was known as republicanism.

One meaning of 'whiggism' given by the Oxford English Dictionary is "moderate or antiquated Liberalism".

Read more about Whiggism:  Coining of "whiggism", Origins, Variations, Across The Empire, Further Reading

Other articles related to "whiggism":

Whiggism - Further Reading - Primary Sources
... Samuel Parr or, Whiggism in its relations to literature" in Works of Thomas de Quincey, vol ... William Hutcheon, Whigs and Whiggism political writings (new edition, 1971) Hickeringill, Edmund, The history of Whiggism or, The Whiggish-plots, principles, and practices (London Printed for E ...