" It is rather odd to find Dunbar referring to dance as useless: ‘dancing, a phenomenon that probably ranks, along with smiling and laughter’, he writes, ‘as one of the most futile of all human universals’.126 I say it is odd because he of all people ought to be able to see past its apparent uselessness to the individual, to its supposed usefulness to the group. Perhaps he does, and calls it ‘futile’ tongue in cheek. But I'd rather agree with him, nonetheless, that smiling, laughter and dance are – gloriously – useless: how many of us really believe that when we dance, laugh, or smile we do so ultimately because of some dreary utility to the group to which we belong? Perhaps there is no end in view. Perhaps these spontaneous behaviours are pointless, with no purpose beyond themselves, other than that they express something beyond our selves. Perhaps, indeed, the fact that so many of our distinguishing features are so ‘useless’ might make one think. Instead of looking, according to the manner of the left hemisphere, for utility, we should consider, according to the manner of the right hemisphere, that finally, through intersubjective imitation and experience, humankind has escaped from something worse even than Kant's ‘cheerless gloom of chance’: the cheerless gloom of necessity. "

― Iain McGilchrist , The Master and His Emissary: The Divided Brain and the Making of the Western World