Students, teachers, and academic researchers can launch or support programs for social change in their local communities or in needy areas around the world, using their research methods and technological savvy to promote innovative ideas with an immediate positive impact on human problems. Business managers, executives, and entrepreneurs can apply the resources and talents of their companies to community needs, as the workers and managers of Walmart did when they led the disaster recovery effort in the Gulf States after Hurricane Katrina, or as the people of Procter & Gamble are now doing with its Pur water treatment product. Leaders, workers, and volunteers at nonprofit organizations, NGOs, charities, and foundations can use their experience in tackling social problems to help them develop creative new partnerships with government, business, and citizens' groups that can do far more in combination to solve humanity's greatest dilemmas than any single sector could do alone.