By 2030, Africa is projected to be home to 60 percent of the world's working-age population. Columbia Journalism School's Professor Howard W. French, author of the recently published "Born in Blackness," joins "Doorstep" co-hosts Nick Gvosdev and Tatiana Serafin to explain how this will impact global economies, climate change politics, and U.S.-China relations. French also calls for a reckoning with history that recognizes the importance of Africa in the global conversation.