It is shown how the epistemological thesis that physics can provide knowledge only of the structure of the physical world emerged in Arthur Eddington’s semi-popular, philosophical and technical writings on the general theory of relativity. The implicitly Kantian character of Eddington’s conception of “world building” in a geometrized physics is developed through examination of Eddington’s two principal works on general relativity. Eddington’s structuralism is contrasted with that associated with Bertrand Russell, and his conception of the mind’s role in “world building” is linked to earlier...

It is shown how the epistemological thesis that physics can provide knowledge only of the structure of the physical world emerged in Arthur Eddington’s semi-popular, philosophical and technical writings on the general theory of relativity. The implicitly Kantian character of Eddington’s conception of “world building” in a geometrized physics is developed through examination of Eddington’s two principal works on general relativity. Eddington’s structuralism is contrasted with that associated with Bertrand Russell, and his conception of the mind’s role in “world building” is linked to earlier views of the mathematician William Kingdom Clifford.