right and justice.

Thus, two men pull the oars of a boat by common convention for
common interest, without any promise or contract; thus gold and
silver are made the measures of exchange; thus speech and words
and language are fixed by human convention and agreement.
Whatever is advantageous to two or more persons, if all perform
their part; but what loses all advantage if only one perform, can
arise from no other principle There would otherwise be no motive
for any one of them to enter into that scheme of conduct.

[Footnote: This theory concerning the origin of property, and
consequently of justice, is, in the main, the same with that
hinted at and adopted by Grotius, 'Hinc discimus, quae fuerit
causa, ob quam a primaeva communione rerum primo mobilium, deinde
et immobilinm discessum est: nimirum quod cum non contenti
homines vesci sponte natis, antra habitare, corpore aut nudo
agere, aut corticibus arborum ferarumve pellibus vestito, vitae
genus exquisitius delegissent, industria opus fuit, quam singuli
rebus singulls adhiberent. Quo minus autem fructus in commune
conferrentur, primum obstitit locorum, in quae homines
discesserunt, distantia, deinde justitiae et amoris defectus, per
quem fiebat, ut nee in labore, nee in consumtione fructuum, quae
debebat, aequalitas servaretur. Simul discimus, quomodo res in
proprietatem iverint; non animi actu solo, neque enim scire alii
poterant, quid alil suum esse vellent, ut eo abstinerent, et idem
velle plures poterant; sed pacto quodam aut expresso, ut per
divisionem, aut tacito, ut per occupationem.' De jure belli et
pacis. Lib. ii. cap. 2. sec. 2. art. 4 and 5.]