, International Journal of Science

“Africa,” Calestous Juma wrote to me in 2015, “is diverging between those who want to talk and those who want to do something practical.” Juma was one of the latter. An international-development scholar, he championed the harnessing of science, technology and innovation for development. He founded Africa’s first science-policy think tank, led major United Nations science initiatives and wrote influential books. Juma, a Kenyan professor at the Harvard Kennedy School’s Belfer Center for Science and International Affairs, died in Cambridge, Massachusetts, on 15 December, at the age of 64.

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