In political science, the term radicalism is the belief that society needs to be changed, and that these changes are only possible through revolutionary means.

Most people think of left-wing politics when they use the noun radicalism, although people on both ends of the spectrum can be described as radical. The word radicalism comes from the Latin radicalis, “of or having roots,” which in turn arose from radix, or “root.” Both radical and radicalism came out of the idea that political change must “come from the root,” or the very basic source of society.

Definitions of radicalism
  1. noun

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

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    the ideology of the most radical element of the French Revolution that instituted the Reign of Terror
    type of:

    ideology, political orientation, political theory

    an orientation that characterizes the thinking of a group or nation

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