“Social” is slightly too coarse-grained a tag. The thing we’re actually interested in is “whether successfully predicting the behaviour of other members of its own species is a strong selection pressure”. Social collaboration is one way this happens—another seems to be “deception” arms races (such as corvids stealing and hiding things from each other), or specific kinds of mating rituals. It also depends on the relative strength of other selection pressures—in most cases highly intelligent creatures also seem to have developed a “slack” in resources they can devote to intelligence (e.g. humans cooking food).
This does seem to hold for cephalopods—a strong datapoint for which being their highly sophisticated forms of communication (e.g. video below).
“Social” is slightly too coarse-grained a tag. The thing we’re actually interested in is “whether successfully predicting the behaviour of other members of its own species is a strong selection pressure”. Social collaboration is one way this happens—another seems to be “deception” arms races (such as corvids stealing and hiding things from each other), or specific kinds of mating rituals. It also depends on the relative strength of other selection pressures—in most cases highly intelligent creatures also seem to have developed a “slack” in resources they can devote to intelligence (e.g. humans cooking food).
This does seem to hold for cephalopods—a strong datapoint for which being their highly sophisticated forms of communication (e.g. video below).