international relations, study of the relations among states and other political and economic units in the international system. Particular areas of study within the field of international relations include diplomacy and diplomatic history, international law international law, body of rules considered legally binding in the relations between national states, also known as the law of nations. It is sometimes called public international law in contrast to private international law (or conflict of laws ), which regulates
..... Click the link for more information. , international organizations, international finance and economics, and communications, among others. In addition, increased attention has been paid in recent years to developing a more scientific understanding of the international system as a whole. Aspects of international relations have been studied as early as the time of the ancient Greek historian Thucydides. As a separate and definable discipline, however, it dates from the early 20th cent., when the first organized efforts were made to find alternatives to wars in nation-state international behavior. Two schools of thought quickly developed. One looks to strengthened international law and international organizations to preserve peace; the other emphasizes that nations will always use their power to achieve goals and sees the key to peace in a balance of power balance of power, system of international relations in which nations seek to maintain an approximate equilibrium of power among many rivals, thus preventing the preponderance of any one state.
..... Click the link for more information. among competing states. With increased importance attached to a theoretical understanding of the whole international system, there has been a growing use of concepts and modes of analysis developed in the natural sciences in an attempt to improve the verifiability and applicability of theories. In many of the leading U.S. universities there are both research institutes and schools of international relations. See diplomatic service diplomatic service, organized body of agents maintained by governments to communicate with one another.

Origins

Until the 15th cent. any formal communication or negotiation among nations was conducted either by means of ambassadors specially
..... Click the link for more information. ; United Nations United Nations (UN), international organization established immediately after World War II. It replaced the League of Nations . In 1945, when the UN was founded, there were 51 members; 192 nations are now members of the organization (see table entitled United Nations
..... Click the link for more information. ; European Union European Community (EC), an economic and political confederation of European nations, and other organizations (with the same member nations) that are responsible for a common foreign and security policy and for cooperation on justice and home affairs.
..... Click the link for more information. .

Bibliography

See R. Aron, Peace and War (tr. 1967); H. J. Morgenthau, Politics among Nations (5th ed. rev. 1978); F. S. Northedge and M. J. Grieve, A Hundred Years of International Relations (1971); R. W. Mansbach and J. A. Vasquez, In Search of Theory (1981); F. S. Pearson and J. M. Rochester, International Relations (2d ed. 1988).

international relations

Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political parties). It is related to a number of other academic disciplines, including political science, geography, history, economics, law, sociology, psychology, and philosophy. The field emerged at the beginning of the 20th century largely in the West and particularly in the U.S. as that country grew in power and influence. The study of international relations has always been heavily influenced by normative considerations, such as the goal of reducing armed conflict and increasing international cooperation. At the beginning of the 21st century, research focused on issues such as terrorism, religious and ethnic conflict, the emergence of substate and nonstate entities, the spread of weapons of mass destruction and efforts to counter nuclear proliferation, and the development of international institutions.