Murray N. Rothbard's 'The Ethics of Liberty' presents a radical libertarian perspective on ethics and individual freedom. Rothbard argues that all individuals have the right to live their lives as they see fit, free from coercion or aggression. He explores the ethical foundations of a free society, challenging conventional notions of state authority and intervention. 'The Ethics of Liberty' is a thought-provoking book that offers a unique perspective on the relationship between ethics, liberty, and the role of the state.