The Principle that freedom is necessary for moral responsibility has received a variety of explications, but few philosophers have doubted that in some plausible sense it is true. However, two philosophers have recently challenged it using very different but equally ingenious arguments. J.F.M. Hunter has provided the more obviously direct attack in arguing that considerations of freedom as such are in no way relevant to assessments of moral responsibility. Harry Frankfurt has directed his fire at the version of the freedom (...) principle which says that a person is morally responsible for what he has done only if he could have done otherwise. Both Frankfurt and Hunter point out the significance of their arguments for the determinism/moral responsibility debate: if there is no freedom requirement for moral responsibility, then even if determinism threatens freedom, it does not follow that determinism threatens moral responsibility. (shrink)

C. A. Campbell has for many years defended vigorously, and often persuasively, the following libertarian claims: that the libertarian concept of freedom of choice is meaningful; that the libertarian variety of freedom of choice is necessary for moral responsibility; and that the libertarian variety of freedom of choice is a reality. This paper will be concerned with Campbell's effort of will argument for the last claim.