In this dissertation I develop a general theory of coercion that allows one to distinguish cases of interpersonal coercion from cases of persuasion or manipulation, and cases of institutional coercion from cases of oppression. The general theory of coercion that I develop includes as one component a theory of second-order coercion. Second-order coercion takes place whenever one person intentionally impairs the formation of the second-order desires of another person, or constrains them after their formation, in a way that frustrates or (...) eliminates the possibility of the victim fulfilling certain of his or her first-order desires. The concept of second-order coercion is important because it suggests that a person's autonomy may be violated in ways that have not been previously recognized. In this dissertation I argue that the unique feature of all cases of coercion is that the alternatives available to the victim, with regard to the formation of his or her will, are intentionally constrained by another person in a way that violates the victim's autonomy. A general theory of coercion should be able to explain how institutions may be understood as coercive. I argue that if institutions are understood as social practices maintained for the purpose of achieving some end, then they may be properly understood as capable of coercion. ;This theory of coercion allows me to make two arguments concerning moral responsibility. First, I argue that current discussions of moral responsibility are inadequate because they fail to take seriously the claim that a person may be responsible, at least in part, for having the beliefs and desires that make a particular action a case of coercion. Second, I argue that discussions of moral responsibility are inadequate because they fail to recognize that an agent may not be responsible for the state of his or her will because he or she may have been coerced in a way that has not been previously recognized. (shrink)