This book defends an event-causal theory of libertarian free will and argues that the belief in such free will plays an important, if not essential, role in supporting certain important values. In the first part of the book, the author argues that possession of libertarian free will is necessary for deserved praise and blame and reward and punishment. He contends that his version of libertarian free will - the indeterministic weightings view - is coherent and can fit with a scientific, naturalistic understanding of human nature. However, the author also notes that we don't have sufficient evidentiary grounds to believe that human beings have this kind of free will. Despite this, he argues there are sufficiently strong value-based/axiological reasons to believe we have such free will and to live and act as if we have it. In the second part of the book, the author makes the case that the belief in such libertarian, desert-grounding free will is very important to defending human dignity in the context of criminal justice, making sense of justified pride and its value, and adding value to our relationships. Free Will's Value will be of interest to scholars and advanced students working in metaphysics, philosophy of mind, action theory, ethics, and the philosophy of law.