In this what's-next business manifesto, "social entrepreneurs" Elkington and Hartigan run with a quote from playwright George Bernard Shaw: "The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore, all progress depends on the unreasonable man." Using that thesis, the authors argue that the best place to find tomorrow's revolutionary business models is on the unpredictable fringes of the mainstream market. There, they find cases like Jack Sim and his Singapore-based World Toilet Organization, who have ingeniously improved living conditions worldwide (and goosed profits) by, among other schemes, convincing governments and corporations to compete for cleanest public restroom honors. The heart of the book are the case studies, of both for-profit and nonprofit social organizations (many of them in Asian and Indian countries), which are mined for ideas and theories regarding their impact on global markets and local...