 Green believes that juridical freedom, moral freedom, and real or perfect freedom all involve aspects of self-determination (“Freedom,” Works II 315–16). Both juridical freedom and moral freedom are essential to responsibility. Responsibility depends on an agent’s normative capacities and her opportunity to exercise them free from undue interference with others. We can see this because significant impairment of either the agent’s capacities or her opportunities is excusing. Whereas juridical freedom depends on the agent’s opportunities, moral freedom depends on her capacities. If so, then self-determination as responsibility requires both juridical and moral freedoms.