Discussing two common critiques on theological interpretations of the concept of the highest good in Kant’s moral philosophy in his paper, Two Conceptions of the Highest Good in Kant, Reath has invited readers to have a secular interpretation of this concept and pointed out its advantages. In the present paper, we will attempt to provide the main principles of Reath’s claims and demonstrate why Kant has stated both of these interpretations in all of his critical works—a subject that has confused Reath. For this purpose, we will indicate that in both of the above interpretations, Kant has offered the concept of the highest good in a historical context, in which the intellectual idea of the highest good as a desired ultimate totality makes the intellect to grow in history and cultivate the talents of human kind through numerous conflicts embedded in nature.
