After the birth of his daughter Max, he announced on Facebook that he will donate $45 billion of his stock over his lifetime to the Chan Zuckerberg initiative.

The announcement was written as a letter to their daughter on Facebook. The initiative will focus on  "personalized learning, curing disease, connecting people and building strong communities."

Mark says that he hopes the initiative will "join people across the world to advance human potential and promote equality for all children in the next generation."

"We will give 99% of our Facebook shares -- currently about $45 billion -- during our lives to advance this mission," he wrote. "We know this is a small contribution compared to all the resources and talents of those already working on these issues. But we want to do what we can, working alongside many others." 

Yesterday, Facebook filed a form with the United States Securities and Exchange Commission Tuesday, saying that Zuckerberg does not intend to give more than $1 billion a year for the next three years, and that he'll maintain a majority voting position at Facebook "for the foreseeable future."

Back in 2010, Zuckerberg signed The Giving Pledge, which was started by Bill Gates and Warren Buffett. It signifies that he will commit more than half of his wealth to philanthropy or charity.

Reminds me of a quote by Winston Churchill: "We make a living by what we get, but we make a life by what we give."