The real human uniqueness is ...

... rhythm. Apparently. Newborn Infants Detect The Beat In Music: "This phenomenon - termed ‘beat induction’ - is likely to have contributed to music’s origin. It enables such actions as clapping, making music together and dancing to a rhythm. Beat induction is also considered to be uniquely human. Even our closest evolutionary relatives, such as the chimpanzee and bonobo, do not synchronise their behaviour to rhythmic sounds." Which I think probably also means that collective ritual is fairly unique too ...