Which Wikipedia policy prohibits personal attacks?

The Wikipedia policy that prohibits personal attacks is called “No personal attacks.”

The policy tells editors not to use Wikipedia discussions to threaten, insult, harass, intimidate, or make personal comments about other contributors. Disagreements about edits and evidence are expected, but criticism should focus on content, conduct, and policy rather than a person’s character or identity.

“No personal attacks” is closely connected with Wikipedia’s broader civility expectations. “Be nice” is an informal piece of advice, “Assume good faith” is a separate behavioral guideline, and “Civility” describes a wider standard for respectful interaction. None is the exact title of the policy named in the question.

The rule does not mean editors must avoid firm criticism. They may point out factual errors, policy violations, disruptive behavior, or weak reasoning when doing so specifically and without turning the dispute into a personal attack. Persistent attacks can lead to warnings, discussion restrictions, or blocks.