Unlike their violent cousins, bonobos are generally peaceful. And while many animals have evolved to be socially agreeable, bonobos — and possibly other species –seem to be experiencing something more precise and profound: the physical and behavioural changes specifically described in studies of domestication, but as a natural evolutionary process.
Domestication is, of course, relative. I'm not sure Maggie Gallagher would think jacking your friends off as the equivalent of "How're you doin'?" would be up her ally.
(Photo of a baby bonobo by Mikey Jones)