Building on the foundations of public international arbitration in the 19th century, the 20th century has witnessed a remarkable proliferation of courts for the international adjudication of disputes: eg the Permanent Court of International Justice, the European Court of Justice, the European Court of Human Rights, and the Inter-American Court of Human Rights.;As we approach the centenary of the first Hague Peace Conference of 1899 that inaugurated the 20th century's international courts, a panel of international jurists evaluates existing and proposed international courts. This work uses the past and present to prepare international courts for the new century. The authors aim to help fashion the courts that can help settle international disputes in the coming decades.