Ideological clashes refer to conflicts that arise from differing beliefs, values, and political systems among groups, often leading to intense disputes and wars. These clashes often stem from fundamental disagreements over governance, social order, and economic models, which can manifest in revolutionary movements, wars, and significant political changes. In the context of the 20th century, ideological clashes were particularly pronounced during the struggle between liberal democracy and authoritarian regimes, as well as between capitalism and communism.