Introduction
from Part I - Pre-Kantian Moral Philosophy
Published online by Cambridge University Press: 31 January 2025
Christian August Crusius (1715–1775) was one of the most important German philosophers in the middle of the eighteenth century. His series of four German textbooks offered a systematic and sophisticated alternative to Wolffianism. Kant was at the beginning of his academic career when Crusius’ philosophical works were first published, so it is not surprising that Kant would come to be influenced by Crusius’ philosophy. This chapter contains a translation of selections from books 1 and 2 of Crusius’ Guide to Living Rationally (1744), capturing his theory of the will and desire, his theory of freedom, his voluntarist theory of ethics, his theory of the end of human life, and his moral proof of the immortality of the soul. The selections will help readers better understand Kant’s reference to Crusius’ moral philosophy as one based on the “will of God” (5:40), among many other things.
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