John Locke. Treatise on Government. Chapter 5. Of Property. Section 36.
The measure of property nature has well set by the extent of men's labour and the conveniencies of life: no man's labour could subdue, or appropriate all; nor could his enjoyment consume more than a small part; so that it was impossible for any man, this way, to intrench upon the right of another, or acquire to himself a property, to the prejudice of his neighbour, who would still have room for as good, and as large a possession (after the other had taken out his) as before it was appropriated. This measure did confine every man's possession to a very moderate proportion, and such as he might appropriate to himself, without injury to any body, in the first ages of the world, when men were more in danger to be lost, by wandering from their company, in the then vast wilderness of the earth, than to be straitened for want of room to plant in. And the same measure may be allowed still without prejudice to any body, as full as the world seems: for supposing a man, or family, in the state they were at first peopling of the world by the children of Adam, or Noah; let him plant in some inland, vacant places of America, we shall find that the possessions he could make himself, upon the measures we have given, would not be very large, nor, even to this day, prejudice the rest of mankind, or give them reason to complain, or think themselves injured by this man's incroachment, though the race of men have now spread themselves to all the corners of the world, and do infinitely exceed the small number was at the beginning. Nay, the extent of ground is of so little value, without labour, that I have heard it affirmed, that in Spain itself a man may be permitted to plough, sow and reap, without being disturbed, upon land he has no other title to, but only his making use of it. But, on the contrary, the inhabitants think themselves beholden to him, who, by his industry on neglected, and consequently waste land, has increased the stock of corn, which they wanted. But be this as it will, which I lay no stress on; this I dare boldly affirm, that the same rule of propriety, (viz.) that every man should have as much as he could make use of, would hold still in the world, without straitening any body; since there is land enough in the world to suffice double the inhabitants, had not the invention of money, and the tacit agreement of men to put a value on it, introduced (by consent) larger possessions, and a right to them; which, how it has done, I shall by and by shew more at large.