Immanuel Kant
02-01-2026
Introduction
Immanuel Kant was born in the kingdom on Prussia in 1724. He was the the fourth of nine total children, only six of which would make it to adulthood. Similar to many at the time, Kant was born into a religious family that stressed Pietest valuesDevotion, humility, and a literal interpretation of the bible.
The education Kant received as a young child is described as strict and highly disciplinary, focusing more on language and religion rather than math and science. It seems that later in life this strict sense of discipline stayed with him, as it is said that his neighbors would their clocks by his daily walks.
Kant is best known for his work in the philosophy of ethics and metaphysics, however his first notable pieces of work concerned other disciplines like geology, the solar system, and anthropology. Of course, as he matured, Kant leaned more into philosophical questions, eventually establishing himself as one of the core thinkers in the Enlightenment
Core Ideas
Perhaps his most radical idea is Kant's belief that your mind shapes the reality you experience. At the time, there was heavy debate between rationalists, who believed knowledge came from reason, and empiricists, who believed that knowledge came from observation/experience. Kant's view was that these are both simultaneously true; we don't just passively view the world, our mind structures it.
Another key contribution from Kant is the idea of synthetic a priori knowledge. Essentially, Kant deems some truths to be informative but known independently of experienceThrough basic axiomatic reasoning. This is pretty much Kant's idea of a first principle. On the same leaf, Kant's work with metaphysics allowed him to conclude that pure reasoning can not answer metaphysical questions. Prompts like: "Does God exist" or "Is the soul immortal" simply can't be reasoned about without arriving at some contradictions.
Finally, arguably the most important work of Kant is his idea of the categorical imperative. Simply put, he believed that true morality must be based on reason, not emotion. To him, this leans on three different pillars:
- Universal law
- Humanity is the end, not the means
- Strong autonomy