"Libertarianism in One Lesson" is a book written by the famous American writer and philosopher David Berliner. In this book, the author explains the main ideas and principles of libertarianism in a simplified but meaningful way - an ideology designed to protect individual freedom and limit state interference in a person's personal life. In his book, Berliner reveals the essence of libertarian philosophy, examines the relationship of the individual to the state, the market, war, freedom of speech and many other aspects of socio-political life. It highlights the idea of individualism, private property, responsibility for one's actions, and the importance of avoiding any violence between people. "Libertarianism in one lesson" is an interesting and fierce work that will help readers better understand the essence of libertarian ideology and its possible effects on modern society.