keynote sxsw 099 zuck optim 300x250 Zuckerberg pledges to give majority of wealth to charityMark Zuckerberg joined fifteen other billionaires, including Facebook co-founder Dustin Moskovitz in signing ‘The Giving Pledge”, which basically means that Zuckerberg and the others have committed publicly to giving away the majority of their fortunes at some point in their lives.

Zuckerberg right now has an estimated worth of $6.9 billion with the current valuation of Facebook, though of course that number is just really a guess at this point as to what his fortune would be if Facebook were to sell today, and could go way up and quickly (or of course, go way down theoretically).

Other billionaires that signed the pledge with Zuckerberg according to the Wall Street Journal included AOL co-founder Steve Case, investor Carl Icahn and Moskovitz. Earlier this year, Zuckerberg agreed on the Oprah Winfrey Show to give $100 million to Newark’s public schools, but that could pale in comparison to what the majority of his eventual fortune could end up being.

Great to see Zuckerberg and Moskovitz doing this, especially as both are under thirty years old.