Abstract

I employ the principle of fairness to argue that many existing states have a moral duty to obey international law simply in virtue of its status as law. On this voluntarist interpretation of the principle of fairness, agents must accept the benefits of a cooperative scheme in order to acquire an obligation to contribute to that scheme’s operation. I contend that states can accept the benefits international law provides, and that only if they do so do states have a fair-play duty to obey international law. In addition, I demonstrate that A. John Simmons’ criticisms of the attempt to use the principle of fairness to establish a duty to obey domestic law – both with respect to understanding the legal order as a cooperative scheme, and to agents’ acceptance of benefits – do not apply in the international context