Jack Dorsey

Benjamin Wachenje

Title: Chairman and co-creator, Twitter; CEO, Square

Born: November 19, 1976, St. Louis, Missouri

Education: New York University (dropped out)

Early Marker: Created open-source logistics software for taxi dispatch.

Big Idea: Microblogging and messaging in 140 characters; now working on platform for small businesses to accept card payments on a mobile device.

Wave of the Future: M-economy, App-economy, social media

Latest Special Reports

  • A logo sits on a sign at the World Economic Forum in Davos, Switzerland, on Thursday, Jan. 23, 2014.

    Coverage of the World Economic Forum’s annual meeting in Davos, Switzerland.

  • Take an in-depth look at the world of modern medicine - examining the treatments, companies and people making a difference in the way we treat illness and injuries today, and laying the foundation for the medical treatments of tomorrow.

  • Fintech

    From Apple Pay to roboadvisors, the worlds of finance and technology are changing the way we live, work, spend money, and do business.

CNBC25: Rebels, Icons and Leaders