Friedrich Hayek's 'The Road to Serfdom' is the founding text of modern libertarianism, a passionate argument that economic planning leads inevitably to political tyranny. Written during World War II, the book contends that Nazism and communism, far from being opposites, share a common root in the socialist belief that enlightened planners can direct economic activity better than markets. Hayek argues that once governments take responsibility for economic outcomes, they must expand control over more and more of life, eventually eliminating the freedom that depends on economic independence. He draws on the continental European experience, which he knew firsthand as an Austrian who fled to Britain, to warn that even well-intentioned planning undermines the rule of law and creates conditions for despotism. The book was controversial when published and remains so; critics argue that Hayek's predictions about the trajectory of social democracy proved wrong and that his framework ignores market failures and inequalities. But as a statement of the classical liberal position, the book is unsurpassed in clarity and force. Readers seeking to understand the intellectual foundations of free-market conservatism will find an essential text, whether they ultimately find it persuasive or not.