An Enquiry Concerning Human Understanding

Descartes doubts everything until he reaches one certainty: I think, therefore I am. The short, personal book that launched modern philosophy. Our own Project Aldus edition.

René Descartes

The short essay that gave the Enlightenment its motto: dare to think for yourself. Our own Project Aldus edition, a few pages you can read in one sitting.

Immanuel Kant

Kant explains why doing the right thing means acting on rules you could want everyone to follow. The book that introduced the categorical imperative. Our own Project Aldus edition.

Immanuel Kant

Mill defends freedom of thought, speech and lifestyle, as long as you don't harm others. A clear, powerful argument that still shapes debates about free speech today.

John Stuart Mill