/world
(CNN) -- He's a billionaire from a humble background who mixes with celebrities and presidents, but his main cause is far from glamorous. Keeping a relatively low profile, he's at the forefront of two revolutions in Africa: first he transformed the continent's mobile phone service, now he's on a mission to promote democracy and reshape Africa's landscape once again.
"Without good governance, there's no hope for us," he told CNN.
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