There is a global movement underway. It challenges our assumptions about how businesses make money and what they do with it. It demands that businesses make social change central to their business models; not an add-on or afterthought. This movement is social entrepreneurship. Within the humanitarian world we are motivated and enlivened by a desire to see social change. Yet somehow we are less comfortable with the use of business to achieve that social change. And yet the sustainability and efficiency of the business world has much to offer as a model for humanitarian problems. So how can social entrepreneurship contribute to humanitarian action?