For more than 40 years, the Robert Wood Johnson Foundation has worked to improve the health and health care of all Americans. As the nation's largest philanthropy devoted solely to the public's health, the Foundation has a unique capacity and responsibility to address the most pressing health and health care issues facing our society. The Foundation’s efforts focus on fostering environments that promote health and on improving how health care in America is delivered and paid for, and how well it does for patients and their families. The Foundation’s work is guided by a fundamental premise: we are stewards of private funds that must be used in the public's interest. Our greatest asset isn't our endowment; it's the way we help to create leverage for comprehensive, meaningful and timely change. The Foundation seeks to create leverage by building and sharing evidence, new ideas, and expertise. We promote change through partnerships and collaboration, with the goal of building a Culture of Health for all Americans.