Believing the wrong thing may sometimes have drastic consequences. The question as to when a person is not only ill-guided, but genuinely at fault for holding a particular belief is an important one: It touches upon the roots of our understanding of such notions as criminal negligence and moral responsibility. The answer to this question may influence the extent to which we are willing to submit each other to punishments ranging from mild resentment to harsh prison terms. This book presents an extensive effort to shed light on the conditions under which we may appropriately deem someone blameworthy for holding a particular belief. It regiments and unifies several debates within contemporary epistemology, ethics and legal scholarship. Finally, the book brings a new philosophical look on issues like our power to control beliefs and the extent and nature of foresight.