In setting up an International Trusteeship System, the Charter established the Trusteeship Council as one of the main organs of the United Nations and assigned to it the task of supervising the administration of Trust Territories placed under the Trusteeship System. Major goals of the System were to promote the advancement of the inhabitants of Trust Territories and their progressive development towards self-government or independence.

The International Court of Justice (ICJ) is the principal United Nations judicial organ. Established in June 1945 by the UN Charter, the ICJ has dual jurisdiction, settling legal disputes submitted by States (contentious cases) and providing advisory opinions on questions of law (advisory proceedings).

The United Nations Research Institute for Social Development (UNRISD) was established in 1963 in an effort to identify hindrances to development that are “social” in nature, looking beyond traditional economic explanations.

The United Nations Interregional Crime and Justice Research Institute (UNICRI) was established in 1968 in an effort to combat issues of crime prevention and criminal justice among the United Nation, civil society and national governments [1]. UNICRI focuses on three overarching themes of security sector reform, access to justice, and peace building efforts.

The United Nations Institute for Disarmament Research (UNIDIR) was established in 1980 by the General Assembly in an effort to create a holistic understanding of disarmament issues, available to all Member States. The mandate of UNIDIR falls under the management of the Secretary-General's Advisory Board of Disarmament Matters and reports directly to the General Assembly.