The Bill & Melinda Gates Foundation is one of the largest private foundations in the world, founded by Bill and Melinda Gates. It is 'driven by the interests and passions of the Gates family.' The primary aims of the foundation are, globally, to enhance healthcare and reduce extreme poverty, and in America, to expand educational opportunities and access to information technology. The foundation, based in Seattle, Washington, is controlled by its three trustees: Bill Gates, Melinda Gates and Warren Buffett. It had an endowment of US38.3 billion as of 30 June 2013. The scale of the foundation and the way it seeks to apply business techniques to giving makes it one of the leaders in the philanthrocapitalism revolution in global philanthropy, though the foundation itself notes that the philanthropic role has limitations.