Joseph Margulies is a writer and litigator, and Professor of the Practice of Government at Cornell University. As a civil rights lawyer, he was Counsel of Record in Rasul v. Bush in 2004, which gave Guantánamo detainees the right to challenge their detention in federal court, and in Munaf v. Geren in 2008, which gave American citizens the right to challenge their detention by the U.S. government.