2014 Time 100 gala

Halima Dangote, left, and honoree Aliko Dangote, Africa's richest man. His Time 100 essay was penned by Microsoft's Bill Gates.

( Ben Gabbe / Getty Images for TIME / April 29, 2014 )

Halima Dangote, left, and honoree Aliko Dangote, Africa's richest man. His Time 100 essay was penned by Microsoft's Bill Gates.

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