 Innovation is the bridge between a problem and a solution. And social innovation involves a fundamental break from practice, either through a new product, a new process, or a new organization. And this change in practice has positive impact on poor, vulnerable populations. It scales, and it usually involves a combination of the private sector, government, and communities, all working together in a new way. So for example, a new water pump, in my view, is just an invention. But if you think about how can this water pump be introduced into communities, how do they learn how to use it, what is the business model for distributing it, maintaining it, keeping it, how can that business model be sustainable so that it can scale and spread and doesn't require donor funding. And most importantly, how does it not have unintended consequences? That to me is social innovation. So how can social problems be a source of innovation for companies to realize business results, as opposed to how do we try and steer and change the business to address a social problem? And I think when companies look at that lens, they come up with lots of creative ideas for how, what they do in service of their shareholders and realizing the financial returns and business imperatives that they need to accomplish, how those can also have social impact. So the key for social innovation to lead to big system change is to get multiple actors to work together, the private sector, government, and civil society.