The main concern of this book is scepticism about moral responsibility. By “moral responsibility” I understand that property of human agents by virtue of which they truly and objectively deserve moral praise or blame for some of their actions. We are naturally non-sceptical about this property. Even philosophical sceptics tend to praise or blame people spontaneously for some of their actions, though they may try to recoil from these spontaneous reactions after reminding themselves of their own r