>Natural selection can only operate on replicators, and genetic replicators only create kin. These replicators may influence group formation and their subsequent natural selection, but is there any evidence for that hypothesis that isn't suitably explained by kin selection?

Territoriality and dominance hierarchies can't be explained in terms of kin selection (except insofar as they can be explained in terms of individual selection; my point is they have very little to do with kinship). Nevertheless they are evidently selected for, and therefore it makes sense to regard them as phenotypes.