Open Philanthropy is a research and grantmaking foundation that aims to share its findings openly. Its current co-chief executive officers are Holden Karnofsky and Alexander Berger, and its main funders are Cari Tuna and Dustin Moskovitz. Dustin says that their wealth, worth $11 billion, is “pooled up around us right now, but it belongs to the world. We intend not to have much when we die.