Odysseus

Odysseus became famous as a hero who fought in the Trojan War. Odysseus left the family and went to satisfy his curiosity, exposing other people to a mortal danger. From the viewing of Dante: the thirst for adventure, the imposition of other ideas on others - insidiousness, disregard for the duties of husband and father - all these are misdeeds and sins of varying degrees of gravity with the complete absence of virtues that could mitigate his fate. However, Dante affirms the human right to know the world around him, respecting Odysseus” cognizance and courage. That's why he's in the eighth circle of hell.