By working to highlight a diverse set of narratives from under represented populations, Joshua Kissi and Karen Okonkwo — two of Inc Magazine’s 30 Under 30 — are addressing a huge gap in the creative market.   Karen was at Arizona State University when she decided to start a blog for sorority women. It gained immediate attention. Yet, when a friend asked why there wasn’t any African Americans showcased on the site, she was defensive. As an African American herself, she thought…