Nozick's Anarchy, State, and Utopia, which garnered a National Book Award the following year, argues among other things, that a distribution of goods is just, so long as the distribution was brought about by free exchanges by consenting adults and was made from a just starting position, even if large inequalities emerge from the process. Nozick appealed to the Kantian idea that people should be treated as ends (what he termed 'separateness of persons'), not merely as a means. For example, forced redistribution of income treated people as if they were merely sources of money. Nozick here challenges John Rawls's arguments in A Theory of Justice that conclude that just inequalities in distribution must benefit the least well off. Nozick himself later recanted the libertarian views he had earlier expressed in Anarchy, State, and Utopia in one of his later books, The Examined Life, calling those views "seriously inadequate." In a 2001 interview, however, he clarified his position: "What I was really saying in The Examined Life was that I was no longer as hardcore a libertarian as I had been before. But the rumors of my deviation (or apostasy!) from libertarianism were much exaggerated." *

In Philosophical Explanations (1981), which received the Phi Beta Kappa Society's Waldo Emerson Award, Nozick provides novel accounts of knowledge, free will, personal identity, the nature of value, and the meaning of life. The Examined Life (1989), pitched to a broader public, explores love, death, faith, reality, and the meaning of life. The Nature of Rationality (1993) presents a theory of practical reason that attempts to embellish notoriously spartan classical decision theory. Socratic Puzzles (1997) is a collection of papers that range from Ayn Rand and Austrian economics to animal rights, while his last production, Invariances (2001) applies insights from physics and biology to questions of objectivity in such areas as the nature of necessity and moral value.

Nozick was notable for his curious, exploratory style and methodological ecumenism. Often content to raise tantalizing philosophical possibilities and then leave judgment to the reader, Nozick was also notable for inventively drawing from literature outside of philosophy (e.g., economics, physics, evolutionary biology) to infuse his work with freshness and relevance.