Bertrand Arthur William Russell, 3rd Earl Russell was a British philosopher, logician, mathematician, historian, social reformer, and pacifist. Although he spent the majority of his life in England, he was born in Wales, where he also died. Russell led the British โrevolt against Idealismโ in the early twentieth century and is one of the founders of analytic philosophy along with his protรฉgรฉ Wittgenstein and his elder Frege. He co-authored, with A. N. Whitehead, Principia Mathematica, an attempt to ground mathematics on logic. His philosophical essay โOn Denotingโ has been considered a โparadigm of philosophy.โ Both works have had a considerable influence on logic, mathematics, set theory, linguistics and analytic philosophy. He was a prominent anti-war activist, championing free trade between nations and anti-imperialism. Russell was imprisoned for his pacifist activism during World War I, campaigned against Adolf Hitler, for nuclear disarmament. He criticized Soviet totalitarianism and the United States of Americaโs involvement in the Vietnam War. In 1950, Russell was awarded the Nobel Prize in Literature, โin recognition of his varied and significant writings in which he champions humanitarian ideals and freedom of thought.โ