From "Materialism and Revolution" (1946) through Hope Now (1980), Jean-Paul Sartre was deeply engaged with questions about the meaning and justifiability of violence. In the first comprehensive treatment of Sartre's views on the subject, Ronald Santoni begins by tracing the full trajectory of Sartre's evolving thought on violence and shows how the "curious ambiguity" of freedom affirming itself against freedom in his earliest writings about violence developed into his "curiously ambivalent" position through his later writings.