 One natural way to arbitrate the issue of whether systems that undergo selection must evolve is to attend to the point of statements of principles of natural selection, or statements of the requirements for selection. Many theorists take it that the point of these principles is to set out the scope of a theory in the special sciences that deals with selection and evolution, evolutionary theory. Lewontin claims that the theory of evolution by natural selection rests on his three principles (1978: 220). Equally, Godfrey-Smith claims that statements of conditions for evolution by natural selection exhibit the coherence of evolutionary theory and capture some of its core principles (2007: 489). Finally, Maynard-Smith (1991) offered a statement of conditions for selection that include evolution as a necessary component, calling the theory so delineated, “Darwin’s theory”. For these writers, the (or at least a) point of the principles seems to be to capture the domain of application of the theory we have inherited from Darwin.