Mary Robinson
On 18 July 2007 in Johannesburg, South Africa, Nelson Mandela, his wife Graça Machel, and Desmond Tutu convened a group of world leaders to contribute their wisdom, independent leadership and honesty to tackle some of the world's toughest problems. Nelson Mandela announced the formation of this new group, The Elders, in a speech he delivered on his 89th birthday.