My aim in this essay is to explore the nature and force of “original-acquisition” justifications of private property. By “original-acquisition” justifications, I mean those arguments which purport to establish or importantly contribute to the moral defense of private property by: offering a moral/historical account of how legitimate private property rights for persons first arose ; offering a hypothetical or conjectural account of how justified private property could arise from a propertyless condition; or simply defending an account of how an individual (...) can make private property in some previously unowned thing . The “original acquisition” to which such justifications centrally refer, then, may be either the first instance of legitimate private property in human history , or only the first legitimate acquisition of some particular thing . But in either case, the justification will involve or entail the defense of one or more moral principles specifying how unowned things can become privately owned — that is, the defense of the kind of principles Robert Nozick has called “principles of justice in acquisition.”. (shrink)