In this Article I will first attempt to describe Holmes\u27s theory of torts in a sufficiently broad context to reveal his methodology, the assumptions underlying his methodology, and the relation between Holmes\u27s methodology and his substantive theory. After placing Holmes\u27s theory within the philosophical tradition of nineteenth-century positivism, I shall attempt a practical critique of Holmes\u27s methodology by analyzing its assumptions, the reasonableness of these assumptions, and the matters the methodology is forced to conclude are irrelevant. I then focus on Holmes\u27s substantive theory to see whether it is internally coherent in light of these methodological assumptions. The analysis concludes by isolating the novel theoretical concepts introduced by Holmes to explain tort liability. This work is a preliminary to further theorizing about tort liability. It is purely critical and analytical