Bill Gates, Melinda Gates

Bill and Melinda Gates look toward each other and smile while being interviewed in Kirkland, Wash., on Feb. 1, 2019. The couple, whose foundation has the largest endowment in the world, are pushing back against a new wave of criticism about whether billionaire philanthropy is a force for good. They said they’re not fazed by recent blowback against wealthy giving, including viral moments at the World Economic Forum and the shifting political conversation about taxes and socialism. (AP Photo/Elaine Thompson)