John O'Sullivan, CBE is a British conservative political commentator and journalist. During the 1980s, he was a senior policywriter and speechwriter in 10 Downing Street for Margaret Thatcherwhen she was British prime minister and remained close to her up to her death. O'Sullivan served from 2008–2012 as vice-president and executive editor of Radio Free Europe/Radio Liberty. He is currently president of the Danube Institute and editor of the Australian monthly magazine Quadrant. He is also a member of the board of advisors for the Global Panel Foundation, a respected NGO that works behind the scenes in crisis areas around the world.
He is known for "O'Sullivan's First Law" (O'Sullivan's Law): "All organizations that are not actually right-wing will over time become left-wing.