Founder and CEO, FacebookAge:
This may have been the year your grandmother joined Facebook. The Harvard dropout and tech wizard is a household name, thanks in part to The Social Network
, but the real-life script is still being written. In 2011 his baby hit 800 million users and was valued at $50 billion, setting the stage for a monster IPO to come. The company also partnered with Skype and redesigned key parts of its service, leading to the usual temporary backlash. On the hunt
: Zuck made headlines earlier this year when he told Fortune his goal for 2011 was to eat only animals he had personally killed.
NEXT: Larry Page
Editorial package reported by Katie Benner, Scott Cendrowski, Betsy Feldman, Mina Kimes, Alex Konrad, Beth Kowitt, Colleen Leahey, Michal Lev-Ram, Tara Moore, Tory Newmyer, Daniel Roberts, Christopher Tkaczyk, Anne VanderMey - Last updated October 25 2011: 5:11 PM ET