Facebook's founder, Mark Zuckerberg, is among the latest to join the Giving Pledge, an effort by Bill Gates and Warren Buffett to commit the country's wealthiest people to increase their charitable donations (or, be publicly humiliated for not doing so???)
Giving Pledge has now signed up over 50 people and their families.
Giving Pledge is not a formal contract. The goals is to give away at least half of their wealth to philanthropic causes either before or after they die.
Both Gates and Buffett are both on record agreeing that it is not wise to give more than a modest sum to their children and families.
