Muslim, was arrested on criminal charges and detained by federal officials under restrictive conditions. Iqbal filed a Bivens action against numerous federal officials, including petitioner Ashcroft, the former Attorney General, and petitioner Mueller, the Director of the Federal Bureau of Investigation (FBI). See Bivens v. Six Unknown Fed. Narcotics Agents, 403 U.S. 388, 91 S.Ct. 1999, 29 L.Ed.2d 619. The complaint alleged, inter alia, that petitioners designated Iqbal a person “of high interest” on account of his race, religion, or national origin, in contravention of the First and Fifth Amendments; that the FBI, under Mueller’s direction, arrested and detained thousands of Arab Muslim men as part of its September–11th investigation; that petitioners knew of, condoned, and willfully and maliciously agreed to subject Iqbal to harsh conditions of confinement as a matter of policy, solely on account of the prohibited factors and for no legitimate penological interest; and that Ashcroft was the policy’s “principal architect” and Mueller was “instrumental” in its adoption and