International law impose upon the nations certain duties with respect to individuals. It is a violation of international law to treat an alien in a manner which does not satisfy the international standard of justice. However in the absence of a specific agreement an individual cannot bring the compliant. Only the state of which he is a national can complain of such a violation before an international tribunal. The state of nationality usually is not obligated to exercise this right and can decide whether to enforce it.
International organizations play increasingly important role in the relationships between nations.
An international organization is one that created by international agreement or which has membership consisting primary of nations. To vitalize the status of international organization of which United States is a member and facilitate their activities Congress has enacted the International Organization Immunities Act, which among other provisions defines the capacity of such organizations. The United Nations, the most influential among international organizations, was created on June 26, 1945. The declared purposes of United Nations are to maintain peace and security, to develop friendly relations among nations, to achieve international cooperation in solving international problems, and to be a center for harmonizing the actions of the nations and attaining their common ends. The Charter of the United Nations has been adhered to by virtually all states.