India, Sept. 21 -- Historians tell us that an explosion of creativity occurs the moment the world starts complaining that there is nothing left to invent, or that the search for solutions to complex problems has come to an end. This explosion is fate's way of reminding us that there is always something just over the horizon of knowledge. Social entrepreneurs are now using their talent to seek better answers to tough social problems at a time when the world has never needed them more. They are responding to challenges with solutions that leave business-as-usual in the dust. They want to use the power of knowledge and the principles of business to create a better world. Their primary objective is to make a contribution, not money. While top...