radicalism

The doctrines or practices of radicals.

The quality of being radical.

The state or character of being radical; the holding or carrying out of extreme principles on any subject; specifically, extreme political liberalism; the doctrine or principle of uncompromising reform in government; the system or methods advocated by the political Radicals of a country.

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

Any of various radical social or political movements that aim at fundamental change in the structure of society

the political orientation of those who favor revolutionary change in government and society