Bill Gates, the founder of Microsoft - he's a good guy, right? Africa's food system has been a major recipient of Gates' $59bn philanthropy. But is Gates helping African food systems - or destroying them? Is he ending hunger - or depleting land resilience and contributing to food insecurity and societal instability?

I'm joined by Tim Schwab, author of the new book, The Bill Gates Problem - and by Million Belay, the co-founder of the Alliance for Food Sovereignty in Africa.