Book excerpt: Can business change the world? Can the world change business? For a new breed of African social entrepreneurs, striving to build and grow enterprises that fight social ills, foster opportunity, and help to improve society, the answer is not can, it's must. Meet the Disruptors: impassioned by purpose, and emboldened by ideals, social entrepreneurs imagine a better way to a better world. And then they go out of their way to bring it to life. Through these tales of daring, struggle, triumph, and innovation, you'll learn their secrets as they blend business principles with social change. From healthcare to mobile gaming, from education to recycling, from dancing to gardening, these are the game-changers, the difference-makers, the doers of good. Here are their stories.