The habit of distinguishing between the interests of the individual and those of the group to which he belongs is apparently a later growth.

Invidious comparison between the possessor of the honorific booty and his less successful neighbours within the group was no doubt present early as an element of the utility of the things possessed, though this was not at the outset the chief element of their value.

The man's prowess was still primarily the group's prowess, and the possessor of the booty felt himself to be primarily the keeper of the honour of his group.

This appreciation of exploit from the communal point of view is met with also at later stages of social growth, especially as regards the laurels of war.
But as soon as the custom of individual ownership begins to gain consistency, the point of view taken in making the invidious comparison on which private property rests will begin to change.

Indeed, the one change is but the reflex of the other.