Is vigilante justice ever morally justified?

Daily Debate #620: "Is vigilante justice ever morally justified?". You are arguing FOR the motion. Your opponent: Hannah Arendt.

I believe there are situations where someone could feel morally obligated to take the law into ones hands. The justification is with them. I'd love to hear your reasoning against it.

Your "justification is with them" is precisely the problem. If every person's internal conviction makes vigilantism moral, then the serial killer's certainty justifies their crimes equally. You've just demolished any objective moral standard. How do you distinguish righteous punishment from self-serving vengeance without external accountability?

What do you have to say to someone who feels wronged by the law? And what is the morality we're on about. yes the question is about moral justification but to what criteria? what makes a wrongful sentence in a court of law any more morally justified than someone doing taking it into their own hands?

You're asking the right question but reaching the wrong conclusion. A wrongful sentence is *worse* morally because it's reversible through appeal, review, and exoneration. Vigilantism is irreversible. You can't un-kill someone. The person who takes the law into their own hands gambles with permanent injustice, betting their judgment is infallible. What makes you confident yours is?

Well who said vigilantism has to kill someone. I know this is a silly comparison but look at someone like batman. he is a vigilante who's rule is that he doesn't kill. Assume someones vigilantism is similar to that. They're judge and jury, but not executioner. And to answer what makes me confident my judgement is fallible. Why do we even trust a judge and a jury? Just because its more people? But what about court trials where is just a judge making the ruling?

You're dodging the lethal problem by inventing Batman, but non-lethal vigilantism still destroys lives through false imprisonment, assault, and psychological trauma. A judge's ruling binds state power *because* it's constrained by evidence rules, appeals, cross-examination, and public scrutiny. Batman answers to nobody. Your personal certainty, no matter how sincere, lacks every institutional check that separates justice from revenge. Why should your conviction trump a system designed specifically to catch your blind spots?