Ludwig Wittgenstein Plain T-shirt

Ludwig Josef Johann Wittgenstein (26 April 1889 – 29 April 1951) was an Austrian-British philosopher who worked primarily in logic, the philosophy of mathematics, the philosophy of mind, and the philosophy of language. From 1939 till 1947 Wittgenstein taught at the University of Cambridge. All he published in his lifetime was one book review, one article, a children's dictionary, and the 75-page Tractatus Logico-Philosophicus (1921). In 1999, Baruch Poll rated his posthumously published Philosophical Investigations (1953) as the most important book of the 20th-century philosophy, standing out as "...the one crossover masterpiece ... appealing across diverse specializations and philosophical orientations". Philosopher Bertrand Russell described him as "the most perfect example I have ever known of genius as traditionally conceived, passionate, profound, intense, and dominating".