What experiences could lead someone to seek revenge how could a obsession with vengeance lead to tragedy?

Experiences such as betrayal, injustice, or loss can lead someone to seek revenge. An obsession with vengeance can consume a person's thoughts and actions, driving them to act impulsively and lose sight of ethical boundaries. This obsession can escalate conflicts, perpetuate cycles of violence, and ultimately lead to devastating consequences for both the avenger and their targets.