Full Idea
Locke thought that property ownership reflected a natural relationship; for him the primordial notion of the ownership of an object is a function of the labour that one puts into it; Marx held a similar view.
Gist of Idea
Locke (and Marx) held that ownership of objects is a natural relation, based on the labour put into it
Source
report of John Locke (Second Treatise of Government [1690]) by Robert Fogelin - Walking the Tightrope of Reason Ch.3
Book Reference
Fogelin,Robert: 'Walking the Tightrope of Reason' [OUP 2004], p.74
A Reaction
Marx would have to think that, in order to believe that capitalist ownership of the means of production used by the workers was a fundamental injustice. A deeper Marxism might see the whole idea of 'ownership' as a capitalist (or feudal) conspiracy.