20171222-juma-calestrous.jpg

20171222-juma-calestrous.jpg

Calestous Juma poses at a table in a portrait photo. Behind him, shelves are lined with books. He has a blue tie and glasses.
Calestous Juma advocated for technological innovations in developing countries and advised the UN, former President Barack Obama and other governments on policy issues. He died in December at 64.
Credit: Courtesy Martha Stewart