Laura and John Arnold are the founders and co-chairs of Arnold Ventures. Started in 2008, Arnold Ventures is a self-funded philanthropy hyper-focused on pinpointing the root causes of our country's most pressing ills, whether that be disparities in health care and education, or dysfunction in our public finance systems. They advocate for evidence-based policy proposals that yield the kind of transformative change really only possible at the government level. They're also signatories of the Giving Pledge.