The article discusses the philosopher and scientific theorist Karl Popper and the neglect of his writings on political philosophy. A onetime communist, Popper became an ardent advocate of political freedom and rejecter of dogma and historicism. The author praises Popper as a brilliant rationalist and truth seeker. The famous episode of Popper being gestured at by philosopher Ludwig Wittgenstein is recounted as a key the men's contrasting minds.