In this paper, I defend a general theory of competition and contrast it with a corresponding general theory of cooperation. I then use this analysis to critique mutualism. Building on the work of Arthur Applbaum and Joseph Heath I develop an alternative adversarial model of competitive sport, one that helps explain and is partly justified by shallow interpretivism, and argue that this model helps shows that the claim that mutualism provides us with the most defensible ethical ideal of sport is (...) false. By replacing that view with an understanding of sporting adversarial ethics we can appreciate that the ethics of sport are more complex than has been commonly recognized. (shrink)