The Microsoft founder and his wife argued against downbeat conventional wisdom in the Gates Foundation’s annual letter , published Tuesday morning. They made the case to BuzzFeed in GIF form.

There are half as many poor people in the world as there were in 1990.

The average life span for women in sub-Saharan Africa has increased by 16 years since 1960.

Seven of the world's top ten fastest-growing economies are in Africa.

The percentage of children in Africa who are in school has almost doubled since 1970.

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