Economics in One Lesson is an introduction to free market economics written by Henry Hazlitt and first published in 1946. It is based on Frédéric Bastiat's essay Ce qu'on voit et ce qu'on ne voit pas (English: "What is Seen and What is Not Seen").[1] The "One Lesson" is stated in Part One of the book: The art of economics consists in looking not merely at the immediate but..