Abstract

Kant claims that the concept of the highest good, the idea of happiness in proportion to virtue, is grounded in the moral law. But this claim has often been challenged. How can Kant justify including happiness in the highest good? Why should only the virtuous be worthy of happiness? This paper argues that when the moral law is interpreted as the criterion for valid application of the concept of the good, the concept of the highest good does indeed follow from the moral law. It also argues that the duty to promote the highest good harmonizes with other duties.