Full Idea
It is impossible to conceive of the idea of property arising from anything but manual labour, for it is not clear what man can add, beyond his own labour, in order to appropriate things he has not made.
Gist of Idea
What else could property arise from, but the labour people add to it?
Source
Jean-Jacques Rousseau (Discourse on the Origin of Inequality [1754], Part II)
Book Reference
Rousseau,Jean-Jacques: 'The Basic Political Writings', ed/tr. Cress,Donald A. [Hackett 1987], p.66
A Reaction
A thorough endorsement of Locke's labour theory of value. It is not clear to me why you have to 'add' something in order to achieve ownership. Don't you own firewood just by picking it up? Golfers give ownership of a lost ball to the first one to see it.
Related Idea
Idea 19781 Land cultivation led to a general right of ownership, administered justly [Rousseau]