Chamath Palihapitiya is cofounder and CEO of venture capital fund Social Capital, which invests in companies that aim to solve societal problems and, hopefully, change the world for the better. For example, Social Capital’s Rama is a wireless carrier that offers low-cost Wi-FI in developing countries and may someday also enter the U.S. market. As of 2016, Social Capital manages more than $1 billion in assets.