ultranationalism

/ˌʌltrəˈnæʃənəˌlɪzəm/
noun
  1. An extreme form of nationalism that promotes the interests of one's own country above all others, often aggressively.
    • The rise of ultranationalism in the early 20th century contributed to the outbreak of war.
    • Historians warn that ultranationalism often suppresses minority cultures and dissent.
    • Ultranationalism can lead to conflicts between neighboring countries.
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