The essential principle of property being to assure to all persons what they have produced by their labor and accumulated by their abstinence, this principle cannot apply to what is not the product of labor, the raw material of the earth.
— JOHN STUART MILL, Political Economy, Book II., Chap. 2, Sec. 5.
When the "sacredness of property" is talked of, it should always be remembered that any such sacredness does not belong in the same degree to landed property.
— JOHN STUART MILL, Political Economy, Book II., Chap. 2, Sec. 6.