Abstract
Nozick’s entitlement theory of justice is, besides Rawls’s theory, one of the most widely discussed and intellectually most attractive conceptions within the field of contemporary political philosophy. Nozick’s theory uses Locke's conception of the state of nature and of natural rights, and tries, starting from this point of view, to deliver a comprehensive systematisation of libertarian political ideals. This essay deals mainly with Nozick’s conception of property rights. The argument is put forward that the concept of exclusive and unrestrictable ownership of which Nozick makes use, doesn’t find any acceptable justification on the basis of his theory.