This Article reports the findings of the largest and most comprehensive study todate of the role qualified immunity plays in constitutional litigation. Qualified immunity shields government officials from constitutional claims for money damages so long as the officials did not violate clearly established law. The Supreme Court has described the doctrine as incredibly strong- protecting all but the plainly incompetent or those who knowingly violate the law. Legal scholars and commentators describe qualified immunity in equally stark terms, often criticizing the doctrine for closing the courthouse doors to plaintiffs whose rights have been violated. The Court has repeatedly explained that qualified immunity must be as powerful as ...