Born in Vienna in 1889 to a father who was a steel magnate of the Austro-Hungarian Empire — a family of immense wealth and deep shadow, three of his elder brothers dying by suicide. He first studied aeronautical engineering in Manchester, but obsession with the foundations of mathematics drove him to Cambridge in 1911 to study under Russell. When war broke out he volunteered, and wrote the Tractatus Logico-Philosophicus in the trenches of the Eastern front and under Italian fire, finishing the manuscript as a prisoner of war in Italy. Believing the book had ended philosophy, he walked away entirely: he gave away his enormous fortune and spent six years as an elementary-school teacher in remote Austrian villages, then designed a house of celebrated precision for his sister. In 1929 he returned to Cambridge, submitting the Tractatus as his PhD thesis — only to turn around and reject its central claims, moving toward the later philosophy of "language games." During WWII he served as a hospital porter in London. He resigned his Cambridge chair in 1947, and died of prostate cancer in 1951; his last words were, "Tell them I've had a wonderful life." His masterwork, the Philosophical Investigations, appeared only two years after his death.
His father died in 1913, leaving him one of the largest fortunes in Europe. Returning from the war, he made a startling choice: he signed away his whole share, keeping nothing. He did not give it to the poor — his logic was coldly, almost harshly precise: give the money to his already-rich siblings, since "more money cannot corrupt them further"; only a small sum went, anonymously, to a few impoverished poets and artists such as Rilke and Trakl.
For the rest of his life he was deliberately poor: bare rooms, the plainest furniture, almost no possessions. This was not a performance of asceticism but a total conviction — he believed property placed a screen between a person and real thinking. The lesson: he treated "how should I live" as a problem as serious as "what is the world," and actually lived by his answer. But note that within this purity lay an impulse to self-punishment — a theme the controversies below will return to.
Source: Ray Monk, Ludwig Wittgenstein: The Duty of Genius (1990), Ch.7.Having finished the Tractatus, he genuinely believed he had ended philosophy, and stayed away from academia for nearly a decade. Yet he was never at peace. In January 1929 he returned to Cambridge and submitted the book as his doctoral thesis — at the defense he clapped his examiners Russell and Moore on the shoulder and said, "Don't worry, I know you'll never understand it."
The deeper turn was internal. The Tractatus held that language is a "picture" of the world, propositions mapping one-to-one onto facts. But, as the story goes, the economist Piero Sraffa once heard him insist that a proposition must share the same logical form as the fact it describes — and replied with the dismissive Neapolitan gesture of brushing the fingertips outward under the chin, asking: "What is the logical form of that?" The blow made him see that meaning need not come from picture-like correspondence, but from the living situations in which words are used. On this he demolished his own entire edifice, turning to "language games" — the meaning of a word is its use in life. That a man would leap down from his proudest achievement is this life's hardest lesson.
Sources: Ray Monk, The Duty of Genius (1990); Wittgenstein's acknowledgment of Sraffa in the preface to the Philosophical Investigations.He was extreme in the bareness of his rooms: his Cambridge quarters were nearly undecorated, a deckchair for furniture, everything superfluous refused. His eating was the same — he did not care what he ate, only that "it should always be the same," sparing the mental effort of choice for other things.
He used the cinema to empty his mind. After a lecture that had exhausted him, he would rush straight to the picture house, sit in the very front row, watch an American Western, and let the screen flush the philosophy out of his head; he also loved cheap detective-story magazines. This was the pressure valve he fitted to a high-pressure mind.
He had an almost compulsive obsession with honesty: around 1936 he sought out his friends one by one to make solemn "confessions" of his past deceits and vanities, however small. And he refused to make a career of philosophy: during the war, unwilling to sit out as a professor in safety, he worked as a porter at Guy's Hospital in London and then as a lab assistant, feeling it more honest.
Sources: Ray Monk, The Duty of Genius (1990); Norman Malcolm, Ludwig Wittgenstein: A Memoir (1958).First, he was a frightening village teacher. Teaching in Austrian villages from 1920 to 1926, he poured himself into the bright children but harshly beat the slow or lazy ones — slapping, pulling hair. In 1926 a frail boy named Haidbauer collapsed after being struck by him, causing a scandal; he fled the village and resigned. Years later his conscience would not rest, and in 1936 he traveled back specifically to apologize, one by one, to the pupils he had beaten. The moral standards of a genius first recoiled onto the children least able to resist.
Second, his intensity crushed those around him. He carried an almost prophetic aura and often talked gifted students out of academic philosophy, urging them into manual work or medicine — sincerely, but with a dogmatism that rerouted more than a few lives. In the famous scene at Cambridge's Moral Sciences Club in 1946, arguing fiercely with the philosopher Karl Popper, he is said to have grown so agitated that he brandished a fireplace poker, leaving a lasting mystery of philosophy's history.
Third, behind the purity was self-torment. He was haunted all his life by depression and self-loathing; those "confessions" were as much self-punishment as honesty. Giving away his money, his austerity, his taking a porter's job — all were, in part, ways of punishing himself and fleeing comfort. Pushing a moral demand to its extreme need not lead to sanctity; it can lead to a double cruelty, toward oneself and toward others.
Sources: Ray Monk, The Duty of Genius (1990); Edmonds & Eidinow, Wittgenstein's Poker (2001), on the poker scene.Wittgenstein's sharpest lesson for the "AI super-individual" is the courage to overturn the framework you are proudest of. The more a methodology has made you succeed, the more quietly it can become your cage; at forty he tore down with his own hands the edifice he had built at thirty, because he was loyal to truth over face. For anyone who works daily with language models, his other insight lies close at hand: meaning is not in a word's "picture" but in the situation of its use — almost a philosophical foundation for prompt engineering and human-AI collaboration, and the limits of language really do frame the world you can call upon. But he leaves a counter-warning too: pushing purity and honesty to the extreme can tip into cruelty, toward self and others. The pursuit of excellence may be exacting, but the moment that exactingness begins to crush the weakest around you, or turns into self-punishment, it is no longer a virtue — it is a sickness that must be seen and reined in.