United Nations System in the context of UN Charter

The United Nations (UN) is a global intergovernmental organization established by the signing of the UN Charter on 26 June 1945 with the articulated mission of maintaining international peace and security, to develop friendly relations among states, to promote international cooperation, and to serve as a centre for harmonizing the actions of states in achieving those goals.

The United Nations headquarters is located in New York City, with several other offices located in Geneva, Nairobi, Vienna, and The Hague. The UN comprises six principal organizations: the General Assembly, the Security Council, the Economic and Social Council, the International Court of Justice, the Secretariat, and the Trusteeship Council which, together with several specialized agencies and related agencies, make up the United Nations System. There are in total 193 member states and 2 observer states.

The following is a list providing an overview of sovereign states around the world with information on their status and recognition of their sovereignty.

The 205 listed states can be divided into three categories based on membership within the United Nations System: 193 UN member states, 2 UN General Assembly non-member observer states, and 10 other states. The sovereignty dispute column indicates states having undisputed sovereignty (189 states, of which there are 188 UN member states and one UN General Assembly non-member observer state), states having disputed sovereignty (14 states, of which there are 5 UN member states, 1 UN General Assembly non-member observer state, and 8 de facto states), and states having a special political status (two states, both in free association with New Zealand).

The United Nations Secretariat is one of the six principal organs of the United Nations (UN), The secretariat is the UN's executive arm. The secretariat has an important role in setting the agenda for the deliberative and decision-making bodies of the UN (i.e., the General Assembly, Economic and Social Council, and Security Council), and the implementation of the decision of these bodies. The secretary-general, who is appointed by the General Assembly, is the head of the secretariat.

The mandate of the secretariat is a wide one. Dag Hammarskjöld, the UN's second secretary-general, described its power as follows: "The United Nations is what member nations made it, but within the limits set by government action and government cooperation, much depends on what the secretariat makes it. It has creative capacity. It can introduce new ideas. It can, in proper forms, take initiatives. It can put before member governments findings which will influence their actions". The United Nations Department of Political Affairs, which has a role analogous to a ministry of foreign affairs, is a part of the secretariat. So is the Department of Peace Operations. The secretariat is the main source of economic and political analysis for the General Assembly and Security Council; it administers operations initiated by UN's deliberative organs, operates political missions, prepares assessments that precede peacekeeping operations, appoints the heads of peacekeeping operations, conducts surveys and research, communicates with non-state actors such as media and non-government organizations, and is responsible for publishing all of the treaties and international agreements.

The United Nations Economic and Social Council (ECOSOC) is one of six principal organs of the United Nations (UN), responsible for coordinating the economic and social fields of the organization, specifically in regards to the fifteen specialized agencies, the eight functional commissions, and the five regional commissions under its jurisdiction.

ECOSOC serves as the central forum for discussing international economic and social issues, and formulating policy recommendations addressed to member states and the United Nations System. It has a rotating membership of 54 countries, and over 1,600 nongovernmental organizations have consultative status with the Council to participate in the work of the United Nations.

United Nations General Assembly (UNGA or GA) is one of the six principal organs of the United Nations (UN), serving as its main deliberative, policymaking, and representative organ. Currently in its 80th session, its powers, composition, functions, and procedures are set out in Chapter IV of the United Nations Charter.

The UNGA is responsible for the UN budget, appointing the non-permanent members to the Security Council, appointing the secretary-general of the United Nations, receiving reports from other parts of the UN System, and making recommendations through resolutions. It also establishes numerous subsidiary organs to advance or assist in its broad mandate. The UNGA is the only UN organ where all member states have equal representation.

The Charter of the United Nations, also referred to as the UN Charter, is the foundational treaty of the United Nations. It establishes the purposes, governing structure, and overall framework of the United Nations System, including its principal organs: the Secretariat, General Assembly, Security Council, Economic and Social Council, International Court of Justice, and Trusteeship Council. The UN Charter is an important part of public international law, and is the foundation for much of international law governing the use of force, pacific settlement of disputes, arms control, and other important functions of the maintenance of international peace and security.

The UN Charter mandates the United Nations and its member states to maintain international peace and security, uphold international law, achieve "higher standards of living" for their citizens, address "economic, social, health, and related problems", and promote "universal respect for, and observance of, human rights and fundamental freedoms for all without distinction as to race, sex, language, or religion". As a charter and constituent treaty, its rules and obligations are binding on all members and supersede those of other treaties.

The United Nations Security Council (UNSC) is one of the six principal organs of the UN system and is the primary organ charged with ensuring international peace and security. Its powers as outlined in the UN Charter include authorizing military action, establishing peacekeeping operations, recommending the admission of new members to the UN General Assembly, approving any changes to the Charter, and enacting international sanctions. Chapter VII of the UN Charter gives the Security Council the power to identify threats to international peace and security and to authorize responses, including the use of force. Security Council resolutions adopted under Chapter VII are binding on UN members and are therefore a source of international law. The Security Council is the only UN body with the authority to issue resolutions that are binding on its member states.

Like the United Nations as a whole, the Security Council was created after World War II in 1945 in the hope of preventing future wars and maintaining world peace, as the League of Nations had been formed following World War I. It held its first session on 17 January 1946 but was largely paralyzed in the following decades by the Cold War between the United States and the Soviet Union (and their allies). Nevertheless, it authorized military interventions in the Korean War, the Congo Crisis, and peacekeeping missions in Cyprus, West New Guinea, and the Sinai Peninsula. With the collapse of the Soviet Union, UN peacekeeping efforts increased dramatically in scale, with the Security Council authorizing major military and peacekeeping missions in Kuwait, Namibia, Cambodia, Bosnia and Herzegovina, Rwanda, Somalia, Sudan, and the Democratic Republic of the Congo.

The headquarters of the United Nations (UN) is on 17 to 18 acres (6.9 to 7.3 ha) of grounds in the Turtle Bay neighborhood of Midtown Manhattan in New York City. It borders First Avenue to the west, 42nd Street to the south, 48th Street to the north, and the East River to the east. Completed in 1952, the complex consists of several structures, including the Secretariat, Conference, and General Assembly buildings, and the Dag Hammarskjöld Library. The complex was designed by a board of architects led by Wallace Harrison and built by the architectural firm Harrison & Abramovitz, with final projects developed by Oscar Niemeyer and Le Corbusier. The term Turtle Bay is occasionally used as a metonym for the UN headquarters or for the United Nations as a whole.

The headquarters holds the seats of the principal organs of the UN, including the General Assembly and the Security Council, but excluding the International Court of Justice, which is seated in The Hague. The United Nations has three additional subsidiary regional headquarters or headquarters districts. These were opened in Geneva (Switzerland) in 1946, Vienna (Austria) in 1980, and Nairobi (Kenya) in 1996. These adjunct offices help represent UN interests, facilitate diplomatic activities, and enjoy certain extraterritorial privileges, but do not contain the seats of major organs.

The International Court of Justice (ICJ; French: Cour internationale de justice, CIJ), or colloquially the World Court, is the principal judicial organ of the United Nations (UN). It settles legal disputes submitted to it by states and provides advisory opinions on legal questions referred to it by other UN organs and specialized agencies. The ICJ is the only international court that adjudicates general disputes between countries, with its rulings and opinions serving as primary sources of international law. It is one of the six principal organs of the United Nations.

Established in June 1945 by the Charter of the United Nations, the Court began work in April 1946. It is the successor to the Permanent Court of International Justice (PCIJ), which was established by the League of Nations in 1920. Its founding statute is an integral part of the UN Charter and draws heavily from that of its predecessor. All UN member states are automatically parties to the ICJ Statute. However, the Court's jurisdiction in contentious cases is founded upon the consent of the states party to a dispute, which may be given through special agreements or declarations accepting the Court's compulsory jurisdiction.

United Nations specialized agencies are autonomous organizations working with the United Nations (UN) and each other through the structure of the United Nations Economic and Social Council at the intergovernmental level, and through the Chief Executives Board for Coordination (CEB) at the intersecretariat level.

One of the principal objectives of the UN is to solve economic, social, cultural and humanitarian issues through international cooperation. Several specialized agencies have been set up to achieve these goals, agencies which may or may not have been created by the UN, but were incorporated into the United Nations System by the United Nations Economic and Social Council acting under Articles 57 and 63 of the United Nations Charter. At present, the UN has in total 15 specialized agencies that carry out various functions on behalf of the UN. The specialized agencies are listed below.

The secretary-general of the United Nations (UNSG or UNSECGEN) is the chief administrative officer of the United Nations and head of the United Nations Secretariat, one of the six principal organs of the United Nations.

The role of the secretary-general and of the secretariat is laid out by Chapter XV (Articles 97 to 101) of the United Nations Charter. However, the office's qualifications, selection process and tenure are open to interpretation; they have been established by custom.