purchase and sale in a " money economy." The habita of thought enforced by these exigencies and by the ubiquitous and ever recurring resort to purchase and sale decide that ownership must naturally, normally, be absolute ownership, with free and unqualified discretion in the use and disposal of the things owned. Social expediency may require particular limitations of this full discretion, but such limitations are felt to be exceptional derogations from the " natural " scope of the owner's discretion.
On the other hand, the metaphysical ground of this right of ownership, the ultimate fact by virtue of which such a discretionary right vests in the owner, is his assumed creative efficiency as a workman ; he embodies the work of his brain and hand in a useful object, — primarily, it is held, for his own personal use, and, by further