The Giving Pledge is a campaign to encourage the wealthiest people in the world to make a commitment to give most of their wealth to philanthropic causes. The campaign specifically focuses on billionaires (or those who would be billionaires if not for their philanthropy) and was made public in 2010 by Warren Buffett and Bill Gates. The Huffington Post reported in April 2012 that "81 billionaires committed to giving at least half of their fortunes to charity".