Friedrich Hayek— Austrian-British economist and philosopher, one of the leading thinkers of the 20th century, whose work significantly influenced economic theory and political philosophy. Hayek won the Nobel Prize in Economics and is known for his work arguing for the role of the free market, individual freedom, and spontaneous order in society. His books, including The Road to Serfdom and The Constitution of Liberty, became classics of liberal thought, shaping the ideology of freedom and economic liberalism throughout the world.