US President George W Bush once referred to Africa mistakenly as "a country" - and was mocked for it by Africans themselves.

But now Siyanda Mohutsiwa, a blogger from Botswana, thinks Africans might in fact be evolving a new shared identity. In our latest "Think Again" film, she argues that pan-Africanism - which once failed to take off when pushed by the continent's elites - has found a new life in the era of social media.

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