Bill and Melinda Gates and Warren Buffett have amassed huge fortunes that they're determined to give away through the Bill and Melinda Gates Foundation.
Since joining forces in 2006 when Buffett pledge the majority of his wealth to the organization, this trio has worked on improving global social issues such hunger, poverty, HIV and family planning.
"It's pretty phenomenal that right as we had learned a lot of things, when we were building up our capacity, that we got this doubling of capacity so that, things like agriculture and malaria eradication over time," said Microsoft founder and Gates Foundation co-chair Bill Gates.
Berkshire Hathaway CEO Warren Buffett has donated nearly 185 million shares of Berkshire Hathaway "B" shares to the foundation, a market value of roughly $15.1 billion, and plans to provide gifts annually throughout his lifetime. It's a commitment that might not have happened if they'd never crossed paths.
"With me, it started on July 5, 1991, and Bill was reluctant to meet me, but we hit it off," Buffett said. "And then we've had a lot of good times since."