Karl Leonhard Reinhold, the Austrian philosopher, was educated by Jesuits until the dissolution of their order in 1773, when he entered the Catholic college of the Barnabites, where he also taught, from 1778 to 1783. In 1783 Reinhold left Vienna for Leipzig and in the same year abandoned Catholicism in favor of Protestantism. A year later he moved to Weimar, where he was invited by Christoph Martin Wieland to contribute to his Teutscher Merkur. Soon he was not only Wieland's closest friend but also his son-in-law. Reinhold's first article, "Gedanken über Aufklärung," in which he traced the emergence of Enlightenment thought, appeared in July 1784, just a few months before the publication of Immanuel Kant's famous essay "What Is Enlightenment?" In his article Reinhold pleaded for the fuller realization of such. Enlightenment aims as greater tolerance toward religious minorities, more widespread secularization of knowledge and its...