Mark Zuckerberg and his wife, Dr. Priscilla Chan, announced yesterday that they plan to donate 99 percent of their Facebook shares over time to charitable purposes such as “personalized learning, curing disease, connecting people and building strong communities.” The couple’s holdings are presently valued at $45 billion, notes The New York Times. The Chan Zuckerberg Initiative will be established to manage the money. News of the charitable plans was unveiled in a letter to the couple’s newborn daughter Max posted on Facebook. Zuckerberg also recently joined the Breakthrough Energy Coalition, a multibillion-dollar clean energy initiative organized by Bill Gates.