After the visit Joe Biden paid to Angola last week, the author of a new book has spoken to FRANCE 24 about hope and optimism in Angola and South Sudan. In “Insurgent Nations: Rebel Rule in Angola and South Sudan”, Paula Cristina Roque looks at two of Africa’s longest civil wars: one in Angola involving UNITA rebels in the 80’s, and the other in Sudan involving SPLM rebels in the 90’s.