Credible Threat delves into the torrent of online abuse directed at women who speak publicly about political and social issues. Sarah Sobieraj shows that identity-based abuse online is a form of patterned resistance to women's voices and visibility, rather than a simple matter of interpersonal bullying. Drawing on interviews with over fifty women who have been targeted by digital harassment, Credible Threat ultimately shows that this toxicity comeswith economic, professional, and psychological costs for those targeted, while also exacting societal-level costs that are rarely recognized. Sobieraj traces these underexplored effects, showing that when identity-based attacks succeed in constraining women's use of digital publics, there are democratic consequencesthat cannot be ignored.