  It is also a matter of controversy whether any conceptual link can be found between atomist physics and the ethical commitments attributed to Democritus.  Vlastos argued that a number of features of Democritus' naturalistic ethics can be traced to his materialist account of the soul and his rejection of a supernatural grounding for ethics (Vlastos 1975).  Taylor is more sceptical about the closeness of the connection between Democritus' ethical views and his atomist physics (Taylor 1999a, pp. 232–4). 