Jeff Weiner is the CEO of LinkedIn, the world's largest professional network. He joined the company in 2008 from Yahoo. Under his leadership, LinkedIn has grown its membership from 33 million to over 645 million members, and increased its revenue from $78 million to more than $6 billion. He has received numerous accolades as CEO, and helped lead Microsoft's acquisition of LinkedIn for $26 billion, one of the largest tech acquisitions of all time.  ABOUT THE OXFORD UNION SOCIETY: The Oxford Union is the world's most prestigious debating society, with an unparalleled reputation for bringing international guests and speakers to Oxford. Since 1823, the Union has been promoting debate and discussion not just in Oxford University, but across the globe.