This thesis investigates one version of Best System Accounts (BSA) of laws of nature: relativized BSA. I argue that relativized BSA, unlike its proponents claim, is an anti-realist account. In the second chapter, I argue that relativized BSA cannot give a plausible metaphysical story for Humean Laws. In the third chapter, I show how acceptance of explosive realism brings irreducible pragmatic elements that render relativized BSA anti-realist. I suggest that there is a general tension between BSA’s naturalist-friendliness and scientific realism.