(n.) The quality or state of being radical; specifically, the doctrines or principles of radicals in politics or social reform.

Fabianism Jacobinism New Left Old Left abandon anarchism anarcho-syndicalism boundlessness conversion criminal syndicalism egregiousness enormousness exaggeration excess excessiveness exorbitance exorbitancy extravagance extravagancy extreme extreme left extreme left wing extremes extremism extremity fabulousness giantism gigantism gluttony gradualism hyperbole hypertrophy immoderacy immoderateness immoderation incontinence inordinacy inordinance inordinateness intemperance intemperateness left-wing extremism meliorism monstrousness nihilism nimiety outrageousness overdevelopment overgreatness overgrowth overindulgence overlargeness overmuch overmuchness progressivism radical reform radicalization reform reformation reformism regeneration revisionism revolution revolutionism sans-culotterie sans-culottism syndicalism too much too-muchness transformation ultraconservatism ultraism unconscionableness undueness unreasonableness unrestrainedness utopianism