Ludwig Wittgenstein: ke revisions ke biich ke antar

 

==== The ''Tractatus'' ====

 

During the First World War Wittgenstein served in the army and developed his logic. He included ethical aspects. In the summer of 1918 he learnt that his friend David Pinsent had been killed in an airplane accident. Wittgenstein became depressed and thought of [[suicide]]. He went to stay with his uncle Paul where he was able to complete the ''Tractatus''. No publisher accepted it, but Russell recognized it was a philosophically important work and wrote an introduction.<ref>[http://www.kfs.org/~jonathan/witt/aintro.html Introduction] by [[Bertrand Russell]]</ref> Wittgenstein did not like it because he thought that Russel had not understood the book. In the end Wilhelm Ostwald's journal ''Annalen der Naturphilosophie'' printed a German edition in 1921, and Routledge's Kegan Paul printed a bilingual edition with Russell's introduction in 1922.

 

=== Final years ===

 

Wittgenstein resigned his position at Cambridge in 1947 to concentrate on his writing. When in 1949 one found out that he had cancer, he had written most of the material that would be published after his death as ''Philosophische Untersuchungen'' (''Philosophical Investigations''), which might be his most important work.

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