The greatest opportunity for world business won't be found in the middle class and affluent. It lies with the poorest of the poor. Profiting off the poor sounds immoral, doesn't it? Actually, it could make good business sense for everybody. We'll hear from a thinker who says business can make a buck and help the poor at the same time. We'll talk about that and the whole concept of corporate citizenship Friday morning on The Sound of Ideas.: C.K. Prahalad, Distinguished Professor of Corporate Strategy, University of Michigan; David Cooperider, Professor and Chairman, Department of Organizational Behavior, Case Weatherhead School of Management; Jenniffer Deckhard, CFO, Fairmount Minerals; Holly Harlan, exec director, Entrepreneurs for Sustainability