Peter Adams's The Insurrectionist is the first comprehensive biography of Major General Edwin A. Walker, a figure who, in the 1950s and 1960s, became a leader of a far-right political movement known for its elaborate conspiracy theories, authoritarianism, and uncompromising white supremacy. Sixty years before the January 6, 2021, attack on the U.S. Capitol, Edwin Walker was charged with insurrection and seditious conspiracy. He was arrested on orders from the attorney general after leading a deadly riot against federal marshals as they protected the first African American student attempting to register at the University of Mississippi. Those who flocked to Walker's side believed an invisible government working with coconspirators in the Kremlin and United Nations would soon enslave America under a one-world dictatorship. Walker's deep state conspiracy theory has echoed through American political culture into the age of QAnon, finding a new home among today's far-right extremists.