Second, and related to the first issue, the classical reading suggests an overly simple, if not crude, account of the relationship between freedom and moral responsibility. Whereas the classical account suggests that responsibility may be analyzed directly in terms of free (or voluntary) action, the naturalistic interpretation suggests a very different picture of this relationship. It would not be correct, for example, to interpret Hume as endorsing what J.L. Mackie has called “the straight rule of responsibility”: which is that “an agent is responsible for all and only his intentional actions” (Mackie, 1977): 208; and also 221–2). This is, nevertheless, a view that the classical interpretation encourages.