Dan Whaley is the founder of Hypothes.is, a non-profit whose dream is to change how we agree about the world around us by crowdsourcing the peer-review of all knowledge. He is a relentless optimist.

In 1995, together with his father and a close friend, Dan launched the first web-based travel reservation system and the company around it – Internet Travel Network. It went public in 1999 as GetThere with 500 employees and was sold to Sabre in 2000. It is still the Internet’s largest B2B transaction system by revenue.