Introduction: the end of charity -- The billionaire effect: disrupters with deep pockets -- The demand for results: good evidence is hard to find -- People, not widgets: what do people really need? -- The "pure" social enterprise: products with purpose -- Big business for good: corporates becoming social enterprises -- Aid goes retail: crowdfunding & direct aid -- Open source aid: the case for openness -- Systems thinking: embracing complexity -- Ending extreme poverty: getting to absolute zero by 2030 -- Ushering in a new era: what we can do.