Tractatus Logico-Philosophicus (The original 1922 edition with an introduction by Bertram Russell)

Book excerpt: The Tractatus Logico-Philosophicus is the only book-length philosophical work published by the philosopher Ludwig Wittgenstein in his lifetime. It was an ambitious project: to identify the relationship between language and reality and to define the limits of science. It is recognized as a significant philosophical work of the twentieth century. Wittgenstein wrote the notes for Tractatus while he was a soldier during World War I and completed it when a prisoner of war at Como and later Cassino in August 1918. It was first published in German in 1921 as Logisch-Philosophische Abhandlung. Tractatus was influential chiefly amongst the logical positivists of the Vienna Circle, such as Rudolf Carnap and Friedrich Waismann.