 Some argue that Russellian monism has historical roots not only in Russell’s writings but also in early twentieth century works by Arthur Eddington (Kadić 2017; cf. Strawson 2006a). In Eddington’s view, science does not describe what he calls the nature of the entities it posits, which he also refers to as the background of “pointer readings and similar indications” (Eddington 1928: 252). For instance, he contends, physics—modern physics, as opposed to the physics of the “Victorian physicist” for whom “Atoms were tiny billiard balls…”—describes atoms not in terms of their natures but rather in terms of pointer readings (Eddington 1928: 259). Thus, like Russell, Eddington seems to affirm a version of structuralism about physics (or something in the vicinity). Further, Eddington proposes that atoms, and perhaps everything else physics describes, might have “something of spiritual nature of which a prominent characteristic is thought” (Eddington 1928: 259). In support of that proposal, he writes,