> “We” and “us” may be more important than “I” and “me”
Not necessarily. It depends on the species and males and females behave differently. Some whales at least have a strong sense of individuality. They are one of the very few animals known to call other specimens by its individual name. The big sperm whales have a sort of matrilineal culture (Pygmy and dwarf sperm whales are solitary probably. Males definitely only care about themselves).
In any case this would be the common behavior, as seen in many fishes, spiders, mammals or birds.
Talking about societies in many dolphins is justified, and not a new thing. Like elephants or humans, they have grandmas also, that is also an uncommon trait. Grandmas keep mental maps of the territory. This is useful to drive the other members directly to that hidden submarine mount that is plenty of fishes. Grandmas also take care of the young whales in surface playgrounds while their mothers dive deep to hunt.