Occupation: Change.org founder
Rattray is often compared to Facebook's Mark Zuckerberg: they share a dweeby intensity and introverted genius. But Rattray told TIME he'd rather Change.org win a Nobel Peace Prize than have a big-ticket IPO. The site is a platform that allows ordinary folks to launch petitions against inequity and gather support from all over the world. With nearly 10 million members, it packs a big punch: witness the incredible success of the Trayvon Martin petition, which attracted nearly 2 million signatures.