Abstract

Are the limits on what we can do, morally speaking—our “moral incapacities” as Bernard Williams calls them—imposed on us from within, by reason itself, or from without, by something other than reason? Do they perhaps have their source in the will, as opposed to reason? In this essay, I argue for a theory of moral incapacity on which our moral incapacities have their source in reason itself. The theory is defended on the grounds that it provides the best explanation of our knowledge of our own moral incapacities. I argue that just as an agent’s reflective commitments play an essential role in the explanation of their knowledge of their moral incapacities, they play an essential role in the explanation of moral incapacities themselves. Since reflective commitments are rational commitments, and rational commitments have their source in reason, moral incapacities have their source in reason itself. The theory of knowledge of moral incapacity offered in this essay draws on elements of Richard Moran’s “deliberative” theory of self-knowledge and elements of that theory are used to offer a theory of moral incapacities which extends and improves on Bernard Williams’ “deliberative” theory of moral incapacities. The resulting theory is then defended against objections and alternatives.