‘Misfits’ are proof positive that the anthropological chestnut of ‘the psychic unity of mankind’ glosses over the actual psychic disunity of the anthropic. The proof militates against rendering misfitness merely as a social construction even as it militates in favour of rendering it as a ‘polythetic class’, the unity of which is not based in the common features of all tokens of a given type but instead in their ‘family resemblance’. Members of the family include those who are deemed incompetent, but also those deemed best suited to specific social stations. Misfitness may also be sought and not merely ascribed. In every case, misfitness has an ethically ambiguous status – and so offers us a lesson of the systemic place of the ‘irritant’ within but also at the edge of and beyond the bounds of any current anthropology of ordinary ethics.