  Hume argues, as well, that the causal necessity of human actions is not only compatible with moral responsibility but requisite to it. To hold an agent morally responsible for a bad action, it is not enough that the action be morally reprehensible; we must impute the badness of the fleeting act to the enduring agent. Not all harmful or forbidden actions incur blame for the agent; those done by accident, for example, do not. It is only when, and because, the action’s cause is some enduring passion or trait of character in the agent that she is to blame for it.