. In a letter addressed to their daughter Max, who was born last week, they pledged to give away shares currently worth about 45 billion dollars. On his Facebook page, Zuckerberg posted a photo of himself, his wife Priscilla Chan and their new daughter Max, along with a post entitled "A letter to our daughter". The letter ends, saying "Max we love you and feel a great responsibility to leave the world a better place for you and all children We can't wait to see what you bring to this world." It is signed Mom and Dad". The plan mirrors a move by other high-profile billionaires like Warren Buffett and Bill and Melinda Gates who have pledged and setup foundations to give away their fortunes to charity