Facebook CEO Mark Zuckerberg and his wife have pledged to give away 99% of their Facebook shares, currently valued at roughly $45 billion.

Five years ago, Facebook CEO Mark Zuckerberg signed a pledge to give the bulk of his massive fortune away. 
Based on a letter written to his recently born daughter, he’s making good on the promise. 
Zuckerberg writes,  “As you begin the next generation of the Chan Zuckerberg family, we also begin the Chan Zuckerberg Initiative to join people across the world to advance human potential and promote equality for all children…” 
He