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Jack Dorsey is an American web developer and businessman widely known as a cofounder of Twitter, and as the founder and CEO of Square, a mobile payments company.

ABOUT THE OXFORD UNION SOCIETY: The Union is the world's most prestigious debating society, with an unparalleled reputation for bringing international guests and speakers to Oxford. It has been established for 189 years, aiming to promote debate and discussion not just in Oxford University, but across the globe.