On the same day Mark Zuckerberg and Dr. Priscilla Chan announced the birth of their first child, they also announced they’d be giving away 99% of their Facebook stock—worth nearly $45 billion.
The open letter follows similar Facebook posts from the couple about their experience with multiple miscarriages and Zuckerberg’s decision to take two months of paternity leave.
The couple will be putting the proceeds from their Facebook stock toward their nearly formed charity that will work toward “advancing human potential” and “promoting equality,” starting with “personalized learning, curing disease, connecting people, and building strong communities,” according to the letter. To start, Zuckerberg has committed to putting up to $1 billion of his stock toward the charity every year for the next three years.