Friedrich Hayek's foundational work of neo-liberal thought argues that individual liberty requires limited government and free markets. Hayek, an Austrian economist who fled Nazi annexation and later won the Nobel Prize, built his case on epistemological grounds: no central authority can possess the dispersed knowledge that markets aggregate through prices. Government intervention, however well-intentioned, must fail because planners cannot know what they would need to know. Hayek distinguishes between law that establishes general rules and legislation that directs specific outcomes, arguing that only the former is compatible with liberty. The book combines philosophy, economics, and legal theory in an ambitious synthesis. It became influential in the Thatcher and Reagan eras and remains a touchstone for classical liberals and libertarians. Critics argue that Hayek underestimates market failures and the possibilities of democratic planning. But the book's influence requires engagement even from those who disagree. This is essential reading for understanding the intellectual foundations of twentieth-century conservatism and contemporary debates about the role of government.