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Bertrand Arthur William Russell, 3rd Earl Russell (1872-1970), Philosopher, mathematician and social reformer

Sitter in 113 portraits
Grandson of the Liberal Foreign Secretary and Prime Minister, Earl (Lord John) Russell, Bertrand made significant contributions to logic, epistemology and mathematics that established him as one of the foremost philosophers of the twentieth century. He published his first work, An Essay on the Foundations of Geometry (1897), at the age of 25. This was followed by The Principles of Mathematics (1903) and Principia Mathematica (1910-13). A pacifist during the First World War, he was imprisoned in 1918. Russell gave the first Reith lectures on radio in 1949. He won the Nobel Prize for Literature in 1950, and became the first President of the Campaign for Nuclear Disarmament (CND) in 1958.