Individuals need not voluntarily adapt for the good of the species, and that's not what I am suggesting. I am suggesting an emergent phenomenon that leans towards behavioral diversity within a species.
An example: Ant colonies exhibit wide diversity in behavior between workers, keepers and queens. Something similar but subtler might be at work in all species.
An example: Ant colonies exhibit wide diversity in behavior between workers, keepers and queens. Something similar but subtler might be at work in all species.