 Pure dispositionalism has been widely supported in the last few decades (Mellor 1974; 2000; Shoemaker 1984: ch. 10 and 11 [in terms of causal roles]; Mumford 1998; 2004; Bird 2005; 2007; Chakravartty 2007; Whittle 2008; see Tugby 2013 for an attempt to argue from this sort of view to a Platonist conception of properties). There are three main arguments in favor of it. First, pure dispositionalism easily accounts for the natural necessity of the laws of nature, insofar as such a necessity just “flows” from the essence of the dispositional properties involved. Secondly, dispositional properties can be easily known as they really are, because it is part of their essence that they affect us in certain ways. Thirdly, at the (presumably fundamental) micro-physical level, properties are only described dispositionally, which is best explained by their being dispositional (Ellis &amp; Lierse 1994; N. Williams 2011).