With the anarchic multiplication of international courts and tribunals, and the concomitant possibility for jurisdictional and decisional conflicts among them to occur, treating the International Court of Justice as the “invisible” international supreme court seems an attractive solution. After all, it is the principal judicial organ of the United Nations and the only court with universal general jurisdiction. Revisiting this proposal, the article argues that the World Court suffers not only from political (extrinsic) constraints, but also from institutional (intrinsic) limitations, thereby endangering its sociological and normative legitimacy. Nonetheless, this does not mean rectifying them for the purpose of enabling it to discharge its envisioned role as the international supreme court. Rather the problem is not so much improving the World Court, but understanding the merits of maintaining the status quo, that is, a decentralised judiciary.