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Ogboni (also known as Osugbo in Ijèbú) is a fraternal institution indigenous to the Yoruba language-speaking polities of Nigeria, Republic of Bénin and Togo. A similar group in Igbo-speaking areas is called Okonko. The society performs a range of political and religious functions, including exercising a profound influence on regents and serving as high courts of jurisprudence in capital offenses. Its members are generally considered to be part of the nobility of the various Yoruba kingdoms of West Africa.
Though versions or lodges of this fraternal group are found among the various types of Yoruba polities - from highly-centralized kingdoms and empires like Oyo, to the independent towns and villages of the Ègbá and the Èkiti(EDO)benin city) - the Ogboni are recognizable for their veneration of the personified earth (Ilè or Odua) and their emphasis on both gerontocratic authority and benevolent service to the community. While membership in the Ogboni generally signified a high level of power and prestige, the society held pre-eminent political authority among decentralized groups like the Ègbá, where they were intimately involved in the selection of rulers that served as little other than figureheads in practice. In contemporary Yorubaland, Ogboni members still command great power and influence in the affairs of their societies, although this is largely due to the history of their respective chieftaincies and not to any official authority.
Ogboni lodges were one of the main commissioners of brass jewelry and sculpture in pre-colonial Yorubaland, using the metal's rust-resistant qualities as an apt metaphor for the immortal functions and beliefs of Ogboni adepts. The most recognizable of these symbols was a pair of Ogboni initiates, one male and one female, attached by a chain and worn around the neck. The pair are thought to symbolize the attachment of the sexes in procreation and balanced society. Generally, one or both figures will hold a thumb in the grip of the opposite hand, demonstrating the paramount Ogboni handsign denoting initiation and membership.
Various fraternities in Nigeria have incorporated references and insignia from the original Ogboni, including the Reformed Ogboni Fraternity, the Indigenous Ogboni, and various others. Many of these contemporary societies combine elements of Ogboni’s historical functions with superficially similar institutions like Freemasonry and the Rotary Club.
Similar traditional institutions combining political, judicial, and sacred duties exist among the various ethnic nationalities of southern Nigeria, including Nze na Ozo in Igbo-speaking southeast Nigeria and Ekpe/Ngbe/Ugbe in the Cross River region of southeastern Nigeria and southwestern Cameroon. Initiatory secret societies are a common feature of pre-colonial government across much of West Africa and Central Africa.