Iran is a charter member of the UN, having joined on 24 October 1945, and belongs to ESCAP and all the nonregional specialized agencies. Iran is also a member of G-77 and a signatory to the Law of the Sea. It is a founding member of OPEC and a leading supporter of higher petroleum prices. In 1979, Iran withdrew from CENTO, causing its demise.
Iran's revolutionary government has aligned itself with the radical Arab states of Libya and Syria, which were the only Arab countries to support Iran in its war with Iraq. Since before 1979, Iranian foreign policy has been to curtail superpower influence in the Persian Gulf area. It also encourages the Islamization of the governments throughout the Middle East, in such countries as Sudan, Algeria, Bahrain and Sau'di Arabia.