The first full authoritative biography of Dorothy Day, American icon, radical pacifist, Catholic Convert, and activist whom Pope Francis I compared to Martin Luther King Jr. and Abraham Lincoln. After a middle-class Republican childhood and a few years as a Communist sympathizer, Dorothy Day converted to Catholicism and became an anomaly in American life for almost fifty years. As an orthodox Catholic, political radical, and a rebel who courted controversy, she attracted three generations of admirers. Day went to jail challenging the draft and the war in Vietnam. She was critical of capitalism and foreign policy, and as skeptical of modern liberalism as political conservatism. Her protests began in 1917, leading to her arrest during the suffrage demonstration outside President Wilson’s White House. In 1940 she spoke in Congress against the draft and urged young men not to register. She frequented jail throughout the 1950s protesting the nuclear arms race. She told audiences in 1962 that President Kennedy was as much to blame for the Cuban missile crisis. She refused to hear any criticism of the pope, though she sparred with American bishops and priests who lived in well-appointed rectories and tolerated racial segregation in their parishes. Dorothy Day is the exceptional biography of a dedicated modern-day pacifist, the most outspoken advocate for the poor, and a lifelong anarchist. This definitive and insightful account explores the influence this controversial and yet “sainted” woman still has today.