Tractatus Logico-Philosophicus

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Lore & Background

The Tractatus Logico-Philosophicus is written in an austere and succinct literary style, containing almost no arguments as such, but consists of 525 declarative statements, which are hierarchically numbered. The work employs seven basic propositions at the primary level (numbered 1–7), with each sublevel being a comment on or elaboration of the statement at the next higher level. Wittgenstein described the writing style as 'highly syncopated' and later regretted this style, telling Maurice O'Connor Drury in 1949 that 'every sentence in the Tractatus should be seen as the heading of a chapter, needing further exposition.'

The book was first published in German in 1921 in the 14th issue of Wilhelm Ostwald's Annalen der Naturphilosophie. The English translation was published with an introduction by Bertrand Russell, though Wittgenstein considered Russell's introduction superficial and a misunderstanding of his work. The Tractatus is dedicated to the memory of Wittgenstein's close friend David Pinsent, who was killed in a flying accident in 1918. Below this dedication is a motto from Austrian writer Ferdinand Kürnberger: 'and whatever a man knows, whatever is not mere rumbling and roaring that he has heard, can be said in three words.'

Originally, in 1919, Wittgenstein attempted to get the Tractatus published in the Austrian journal Der Brenner. He wrote to editor Ludwig von Ficker explaining that the point of the book was 'ethical,' stating: 'My work consists of two parts: the one presented here plus all that I have not written. And it is precisely this second part that is the important one. My book draws limits to the sphere of the ethical from the inside as it were.'

Reader's Guide

The Tractatus Logico-Philosophicus is recognized by philosophers as one of the most significant philosophical works of the twentieth century and was influential among the logical positivists of the Vienna Circle, such as Rudolf Carnap and Friedrich Waismann. It also influenced Bertrand Russell's article 'The Philosophy of Logical Atomism.' Wittgenstein's later works, notably the posthumously published Philosophical Investigations, criticised many of his ideas in the Tractatus. There is nevertheless a common thread in Wittgenstein's thinking; the contrast between 'early' and 'late' Wittgenstein has been countered by such scholars as Pears (1987) and Hilmy (1987). A relevant aspect of continuity concerns 'meaning as use,' connecting his early and later writings through his appeal to direct consequences of a term or phrase, reflected in his speaking of language as a 'calculus.' These passages are crucial to Wittgenstein's view of 'meaning as use,' though they have been widely neglected in scholarly literature. The centrality and importance of these passages are corroborated and augmented by renewed examination of Wittgenstein's Nachlaß, as done in works such as 'From Tractatus to Later Writings and Back – New Implications from Wittgenstein's Nachlass' (de Queiroz 2023), 'From the Notebooks to the Investigations and Beyond' (de Queiroz 2025a), and 'Meaning as Use, Application, Employment, Purpose, Usefulness' (de Queiroz 2025b).

Did You Know?

• The Latin title was suggested by G. E. Moore as homage to Baruch Spinoza's Tractatus Theologico-Politicus (1670).
• Wittgenstein wrote the notes for the Tractatus while serving as a soldier during World War I and completed it during a military leave in the summer of 1918.
• The book is dedicated to the memory of Wittgenstein's close friend David Pinsent, who was killed in a flying accident in 1918.
• Wittgenstein told Maurice O'Connor Drury in 1949 that 'every sentence in the Tractatus should be seen as the heading of a chapter, needing further exposition.'
• The Tractatus contains 525 numbered statements, with seven basic propositions at the primary level (numbered 1–7).