Ten years ago, the idea of getting into a stranger???s car, or walking into a stranger???s home, would have seemed bizarre and dangerous, but today it???s as common as ordering a book online. Uber and Airbnb are household names: redefining neighbourhoods, challenging the way governments regulate business and changing the way we travel. In the spirit of iconic Silicon Valley renegades like Steve Jobs and Bill Gates, a new generation of entrepreneurs is sparking yet another cultural upheaval through technology. They are among the Upstarts, idiosyncratic founders with limitless drive and an abundance of self-confidence. Young, hungry and brilliant, they are rewriting the traditional rules of business, changing our day-to-day lives and often sidestepping serious ethical and legal obstacles in the process.