The strength of your community is the best predictor of your project’s long-term viability. What happens when that community is gradually infiltrated by assholes, who infect everyone else with their constant negativity and personal attacks? Although someone may be a valuable technical contributor, that person will never contribute as much to the project as the many others who are scared away and demotivated. This talk will teach you, using quantified data and academic research from the social sciences, about the dramatic impact assholes are having on your organization today and how you can begin to repair it.