radicalism

例句：

1. 1. Radicalism is a philosophical movement that advocates for the overthrow of established systems and the establishment of new ones.
   激进主义是一种哲学运动，主张推翻现有的制度，建立新的制度。
2. 2. The radicalist group has been vocal about their opposition to the government's policies.
   激进团体对政府的政策表示强烈反对。
3. 3. Radicalism can lead to social unrest and division, as seen in many revolutionary movements throughout history.
   激进主义可能导致社会动荡和分裂，历史上许多革命运动都证明了这一点。