Mark Zuckerberg’s wife, Priscilla Chan, just gave birth to the couple’s first child. They celebrated the arrival of their baby girl by announcing they would giving much of their fortune to charity. Over their lifetime they have pledged to donate 99 percent of their shares of Facebook, the social media company Zuckerberg founded. They plan to give to groups and individuals who work to make life better for the next generation. Their focus is on education, curing disease, and strengthening communities. Zuckerberg plans to remain CEO of Facebook.