
Of the wealthiest people in the world, about 250 have pledged to give away the majority of their fortune—an effort coined the Giving Pledge. It was started by Bill Gates, Melinda French Gates, and Warren Buffett in 2010, and billionaires including Mark Zuckerberg, Elon Musk, Larry Ellison, and Bill Ackman have signed on.
Although it’s often also referred to as the Billionaire’s Pledge, other wealthy donors have committed to the endeavor. One of the latest signatories is Craigslist founder Craig Newmark, who announced on LinkedIn this weekend he’s officially joining the Giving Pledge.