Comrades in an in-group have never forced these on each other.
So far as sympathy was developed at all, it was in the in-group, between comrades.
You'd have formed your own in-group, as prisoners, dedicated to your own welfare.
This control by the in-group over its members makes for solidity and impenetrability in its relations with the out-group.
He describes the transition from contacts of the out-group to those of the in-group, or from remote to intimate relations.
These exigencies also make government and law in the in-group, in order to prevent quarrels and enforce discipline.
In the in-group it was so far from being an act of hostility, or veiled impropriety, that it was applied to the closest kin.
Another use of cannibalism in the in-group is to annihilate one who has broken an important taboo.
Cannibalism was so primordial in the mores that it has two forms, one for the in-group, the other for the out-group.
What is lacking is an authority which can impose commands on the in-group and extrude blood revenge from it.