Immanuel Kant

Immanuel Kant (1724 CE–1804 CE) was a German philosopher whose critical philosophy systematically unified, and subsequently transformed, modern epistemology, metaphysics, and ethics. Born in Königsberg, Prussia, where he spent his entire academic career, Kant sought to bridge the deep divide between continental rationalism and British empiricism. His revolutionary text, Critique of Pure Reason (1781 CE), enacted a Copernican revolution in philosophy by arguing that while all knowledge begins with experience, the mind possesses innate, structural categories that actively shape how we perceive reality. He distinguished between the phenomenal world (things as they appear to us) and the noumenal world (things-in-themselves), which remains fundamentally unknowable. In his ethical treatises, notably Groundwork of the Metaphysics of Morals (1785 CE) and Critique of Practical Reason (1788 CE), Kant formulated a deontological, duty-based moral framework centered on the categorical imperative—an absolute moral law demanding that individuals act only on principles that could be willed as universal laws.