Jack Dorsey

Jack Dorsey is one of the most influential figures in modern technology, having co-founded two major companies that fundamentally reshaped digital communication and finance. In 2006, he co-founded Twitter (originally 'twttr'), serving as CEO initially and later returning for a second tenure from 2015 to 2021. Twitter's constrained format revolutionized social media, driving global discourse and real-time information exchange. While running Twitter, Dorsey simultaneously launched Square (now Block) in 2009, creating easy-to-use mobile payment systems that empowered small businesses. Dorsey's management style was unique due to his role as dual CEO, navigating intense public scrutiny for both companies. His later career trajectory has been defined by a philosophical shift toward decentralization, open protocols, and a deep commitment to Bitcoin. He views Bitcoin not just as a currency, but as a foundational technological layer for global economic empowerment. This focus led him to step down from Twitter in 2021 to fully dedicate his efforts to Block, where he drives initiatives centered on Bitcoin development, open-source projects, and decentralized finance. Beyond his corporate life, Dorsey is known for his strict, often ascetic lifestyle, incorporating rigorous intermittent fasting, extreme exercise, and stoic principles. His impact stretches across social infrastructure, digital payments, and the burgeoning decentralized web, marking him as a complex and foundational figure in 21st-century innovation.

• •Dorsey is a licensed masseur, having trained while living in Oakland, California.
• •He famously walked five miles (8 km) to and from Twitter’s office every day for exercise.
• •He has stated that he only eats one meal per day (OMAD) and sometimes engages in weekend-long fasts.
• •His early interest in dispatch routing and mapping services influenced his initial ideas for Twitter.