 It is often taken for granted by metaphysicians that the fundamental quantities of physics provide a ready source of monadic foundations because physical quantities are intrinsic characteristics. The vision of reality metaphysicians typically ascribe to physics is akin to Lewis’s doctrine of “Humean Supervenience”, according to which there are intrinsic properties which need nothing bigger than a point to be instantiated and there’s no difference without a difference in the arrangement of intrinsic properties over points (Lewis 1986: ix–xvi). And certainly some metaphysicians have endeavoured to make good upon this vision, arguing, for example, that velocity is an intrinsic property (Tooley 1988; Bigelow &amp; Pargetter 1990: 62–82). But not only is this view contentious, there are many other notions in classical mechanics, such as force, stress, strain and elasticity, represented using vectors and tensors, that belie the conception of fundamental physical quantities as intrinsic (Butterfield 2006, 2011).