Bertrand Russell on WikiBertrand Arthur William Russell, 3rd Earl Russell, OM, FRS (18 May 1872 – 2 February 1970), was a British philosopher, logician, mathematician, historian, advocate for social reform, and pacifist. Although he spent the majority of his life in England, he was born in Wales, where he also died.

Russell was an influential philosopher and mathematician. He led the British "revolt against Idealism" in the early 1900s and is considered one of the founders of analytic philosophy along with his proteges Wittgenstein and Frege. He co-authored, with A. N. Whitehead, Principia Mathematica, an attempt to ground mathematics on logic. His philosophical essay "On Denoting" has been considered a "paradigm of philosophy."[2] Both works have had a considerable influence on logic, mathematics, set theory, linguistics and analytic philosophy.

http://en.wikipedia.org/wiki/Bertrand_Russell