From the way in which Gaius speaks of it, when treating of vindicatio (iv. 16), we are led to suppose that the booty belonged to he who captured it. The staff used in the vindicatio, he explains, represents the spear, and the spear is the sign of lawful possession : quod maxime sua esse credebant, quae ex hostibus cepissent. To base the act of private property upon the law of booty without acknowledging the intervention of public property in the booty, can mean only that it belonged to each person individually, and that the early Romans saw in it the principal source of private property.
If Gaius really held this opinion, and if it were not for the sake of mere brevity that he omitted to mention this intervention of public property, he has committed a historical blunder, for booty did not fall to the share of the individual but of the public -- it could become private property only by its transfer on the part of the people. With this limitation, however, it is quite consistent to assert that antiquity considered booty as the principal source of property (maxime sua esse credebant). It reveals to us the migratory time wherein well-nigh every possession was taken from the enemy, and when peaceful acquisition through labour was quite insignificant compared to that gained by plunder : they were the robbers of the Hirpine legend.
We only have only to clearly realize what this law of private booty involves in order to be convinced of its impossibility. It need hardly be remarked that it could not apply to land or soil. Neither could it apply to victuals -- cattle or corn -- or some would have lived in luxury while others would have starved, and it might have led to a fight for subsistence between these companions-at-arms. Neither could objects of value nor prisoners of war be assigned to whomsoever, by some lucky chance, had happened to capture them. Booty was by no means always the well-earned reward for personal valour; on the contrary, it fell more often to the share of the less valiant. The former would always be found in the front, in pursuit of the retreating enemy; the latter kept as much as possible in the background. It would therefore be comparatively easy for them to rob the enemy lying on the field of battle, or carry them away as slaves, and thus deprive those to whom they owed their opportunity of their rightful due. To adjudge the booty to each individual would have been equivalent to sowing seeds of strife and dissension as to the rightful possession of it, and would have been called forth envy and malice from the less fortunate; it would have been throwing the bone of contention amongst the people -- nay, by losing sight of the principal object in view, the overthrow of the enemy, in their zeal to secure the booty it might have endangered the issue of the battle. No one, not even the bravest, could claim booty for himself; left entirely to his own resources in the enemy's land, he could never have secured it. Booty was in reality the fruit of the joint under-taking; each on contributed his share. Therefore booty had to be joint property also; community in danger and expenditure of strength, and community also in the gains -- this was a condition which would appeal to the most crude conception of right. Marauding expeditions by land or by water gave the initiative to this banding together in one common pursuit, and laid the fundamental idea of society in the mind of the people long before the peaceful form of this union had taken the place of the originally predatory one.
Thus the principle of the common possession of booty was rendered inevitable by circumstances, and as to the three of the Indo-European nations -- Greeks, Romans, and Teutons -- we are in a position to prove that they acknowledged the same[1].