In 2011, who did Forbes say was the youngest self-made billionaire in history?

Dustin Aaron Moskovitz (born May 22, 1984) is an American Internet entrepreneur who co-founded Facebook with Mark Zuckerberg, Eduardo Saverin, Andrew McCollum and Chris Hughes. In 2008, he left Facebook to co-found Asana with Justin Rosenstein. In March 2011, Forbes reported Moskovitz to be the youngest self-made billionaire in history, on the basis of his 2.34% share in Facebook.

Four people, Mark Zuckerberg, Eduardo Saverin, Chris Hughes, and Dustin Moskovitz founded Facebook in their Harvard University dorm room in February 2004. Originally called thefacebook.com, it was intended as an exclusive online directory of all Harvard's students to help residential students identify members of other residences. In June 2004, Zuckerberg, Hughes and Moskovitz took a year off from Harvard and moved Facebook's base of operations to Palo Alto, California, and hired eight employees. They were later joined by Sean Parker. At Facebook, Moskovitz was the company's first chief technology officer and then vice president of engineering; he led the technical staff and oversaw the major architecture of the site, as well as being responsible for the company’s mobile strategy and development.