(These are contributions to a running project)
All species manifest the same behaviour. Differences of behaviour are only found among individuals. Individuals are pan-species. Individual variation, manifested as differences of behaviour, arose with the onset of communion, but pan-species individualism is retained.
The behaviours we characterize as being unique to a particular person vary, as we know. Individualism arose before the creation of species, but it is still retained in the individuals that populate the class we call species.