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.
Cannibalism was so primordial in the mores that it has two forms, one for the in-group, the other for the out-group.
Another use of cannibalism in the in-group is to annihilate one who has broken an important taboo.
What is lacking is an authority which can impose commands on the in-group and extrude blood revenge from it.