The Critique of Practical Reason Author:Immanuel Kant Immanuel Kant was a prominent 18th-century German philosopher. Kant is often considered to be the first modern philosopher and he contributed significantly to many fields including ethics, political theory, and metaphysics. Kant also believed that perpetual universal peace could be achieved through democracy and international cooperation. The... more » Critique of Practical Reason is a book that was influential in the development of ethics and moral philosophy.« less