All the nations belonging to the OPEC (Organization of the Petroleum Exporting Countries) have in common being oil-exporting developing nations.
The mission is to coordinate and unify the petroleum policies of its Member Countries and ensure stabilization of oil markets.
It was founded in Spetember 14th, 1960 during a meeting in the Iraqui capital of Baghdad, attended by five founder members: Iran, Iraq, Kuwait, Saudi Arabia and Venezuela. These countries were later joined by Qatar, Nigeria, Congo, Indonesia, among others. Currently, the organization has a total of 15 Member Countries, ditinguished between Founders and Full Members.