The nature of existence and the existence of natureDoes the modern idea of ​​reason help man understand why and not just what? This concept comes mainly from the philosophers of the Enlightenment. Learning something that is accepted as true for the first time, such as mathematics and various proofs, usually ends up adding it to our plethora of knowledge to pass the next test. However, before the Enlightenment, many people believed that through learning or experience something could exist. Immanuel Kant ended up being the most influential philosopher of the 17th and 18th centuries. He and Rousseau were the first to disagree with the common ideas of skepticism and dogmatism. Alongside his analytic theories, Kant wrote about what is now labeled the categorical imperative. His writings in Critique of Pure Reason carry with them principles found hidden in the subterfuges of today's society, making Kant one of the most advanced human beings during the Enlightenment. The era of the Enlightenment in Europe took place around the same time as the American Revolution, which largely explains why the philosophies of Kant and Rousseau are so common today, especially in our country. Immanuel Kant's philosophies rivaled those of the typical social structure of the world in the 17th and 18th centuries. His revolutionary ways of thinking are mostly seen in modern American and European rights and codes, especially the Bill of Rights in the American Constitution. Immanuel Kant was born on April 22, 1974 to a fundamentalist pietist family, the fourth of nine children. Raised in Konisburg, he spoke German and lived in a city known for being a commercial capital of its time, being close to the southeastern shore of the Bal...... middle of paper ...... they remained faithful unlike many other philosophers. “Once we learned that the Earth is not flat, did that change? Or did he stick around? (Kant) Knowledge and experience do not change the facts; they simply allow us to further understand the truth and subsequently progress in our eternal quest for knowledge. Works Cited Rohlf, Michael. "Immanuel Kant." Stanford University. Stanford University, May 20, 2010. Web.Kant, Immanuel. “An answer to the question: what is the Enlightenment?”. The Longman Anthology of World Literature Vol D 2nd Edition. April Alliston. Pearson, 2009. 599-604. Print Unknown author “Immanuel Kant”. Encyclopedia of World Biography. Detroit: Gale, 1988. Web.Burnham, Douglas. "Encyclopedia of Philosophy on the Internet". Kant, Immanuel: Aesthetics. IEP and Web.Emecz, Paul. "Ethical theory". Kant's ethical theory. RSRevision and Web.