King of Swaziland and head of the Swazi Royal Family.

Director of The Earth Institute, Quetelet Professor of Sustainable Development, and Professor of Health Policy and Management at Columbia University.

Economist, author of "Dead Aid" (2009) and "How the West Was Lost" (2011).

Telecommunications entrepreneur and philanthropist.

Environmental campaigner, Kenyan politician and 2004 Nobel Peace laureate.

President of Zambia and contestant in the 2011 election.

Governor of Kano State and candidate for the presidency in the 2011 elections.

Muhammadu Buhari was the military ruler of Nigeria (December 31, 1983 - August 27, 1985) and an unsuccessful candidate for...

Former president of South Africa and Nobel peace laureate in 1993.

Olara A. Otunnu is the president of the Uganda's People's Congress and will be a candidate in the 2011 presidential...