From the cultivation of land, there necessarily followed the division of land; and from property once recognised, the first rules of justice. For in order to render everyone what is his, it is necessary that everyone can have something.
Gist of Idea
Land cultivation led to a general right of ownership, administered justly
Jean-Jacques Rousseau (Discourse on the Origin of Inequality , Part II)
This looks rather obviously correct. You don't plant crops if you are not protected in your right to reap what you have sown, and you would expect to re-sow from the proceeds. Other people will want you to do this.
Rousseau,Jean-Jacques: 'The Basic Political Writings', ed/tr. Cress,Donald A. [Hackett 1987], p.66