from the Writer's Almanac [4/22] "It's the birthday of Enlightenment philosopher Immanuel Kant (books by  this author), born in Konigsberg, Prussia, in 1724. His father  was a saddle maker. He studied theology, physics, mathematics, and  philosophy at university, and worked for a time as a private tutor; he  made very little money, but it gave him plenty of time for his own work.  He lectured at the University of Konigsberg for 15 years,  until he was eventually given a tenured position as professor of logic  and metaphysics in 1770. Though he enjoyed hearing travel stories, he  never ventured more than 50 miles from his hometown, believing that  travel was not necessary to solve the problems of philosophy. In his most influential work, The Critique of Pure Reason (1781), he  argued against Empiricism, which held that the mind was a blank slate to  be filled with observations of the physical world, and Rationalism,  which held that it was possible to experience the world o...