Monica Hunter-Hart is a reporter covering the world's richest people. Unsurprisingly, all but two of them inherited their wealth. That goes for the world’s youngest billionaire, Johannes von ...

This week, Forbes released its annual Forbes 400 list, revealing the 400 wealthiest people in the US. At age 30, Dustin Moskovitz is the second-youngest billionaire in America, after 24-year-old ...