Abstract

I defend the claim that Kant is a moral antirealist, or (as he would state it) moral idealist. I first define moral realism and moral idealism, concluding that moral idealism requires that every moral property depend upon the minds of moral agents. Kant's metaethical theory is idealist regarding the nature of value, since it depends upon the voluntary choices of moral agents in pursuing particular ends, the nature of right, since the categorical imperative stems from moral agents' own reason, and the nature of moral agency, since freedom is construed in terms of the use of reason