hybris

/ˈhaɪbrɪs/
noun
  1. Excessive pride or self-confidence, especially in ancient Greek tragedy, that leads to a person's downfall.
    • Many modern leaders fall because of hybris, thinking they are above the rules.
    • In the story, the hero's hybris caused him to ignore all warnings and lose his kingdom.
    • The king's hybris made him believe he could defeat the gods themselves.