Olusegun Obasanjo
Obasanjo is now a global advocate for human rights as well as a hugely respected mediator and elections observer. Experience for those roles was accrued from nearly 13 years as Nigeria’s head of state.
Between February 1976 and and October 1979, General Obasanjo was Nigeria’s military ruler. He was then elected as a civilian president between 1999 and 2007.