Abstract

Whence does international law derive its normative force as law in a world that remains, in many respects, one where legitimate politics is practiced primarily at the national level? As with domestically focused legal theories, one standard answer is positivistic: the law's authority is based on its origin in agreed procedures of consent. This is certainly plausible with respect to treaty obligations and commitments that derive from the United Nations Charter, but it leaves customary international law vulnerable to legitimacy critiques—of which there is no shortage among international law skeptics. Even with respect to conventional international norms, such as treaty provisions, there is often a sense that such consent is democratically thinner than the public consent to domestic law, particularly fundamental domestic law, constitutional norms, and derivative principles of legitimate governance. State consent in international law, in this view, is often a very imperfect proxy for democratic consent to international legal norms. While it is obvious to international lawyers why state consent should make international norms prevail over domestic norms to which there is arguably deeper democratic consent, persistent critics of international law have questioned whether this should be so as a matter of legitimacy.