1. extreme political or social views or practices that advocate fundamental changes to existing systems
Usage: plural form of radicalism

Examples

• The professor studied various radicalisms throughout history.
• Political radicalisms often emerge during times of social upheaval.
• The book examines left-wing and right-wing radicalisms of the 20th century.
• Different radicalisms competed for influence during the revolution.
• Students debated the merits and dangers of political radicalisms.
• The historian traced the evolution of religious radicalisms over centuries.