He married Anna Schapire in 1907, who died in 1911 while bearing their son, Paul, and then married a close friend, the mathematician and philosopher Olga Hahn. Perhaps because of his second wife's blindness and then because of the outbreak of war, Paul was sent to a children's home outside Vienna, where Neurath's mother lived, and returned to live with both of his parents when he was nine years old.
Neurath died, suddenly and unexpectedly, in December 1945. After his death, Marie Neurath continued the work of the Isotype Institute, publishing Neurath's writings posthumously, completing projects he had started and writing many children's books using the Isotype system, until her death in the 1980s.
He then rejects the positivist treatment of language in general and, in particular, some of Wittgenstein's early fundamental ideas.
We are like sailors who on the open sea must reconstruct their ship but are never able to start afresh from the bottom. Where a beam is taken away a new one must at once be put there, and for this the rest of the ship is used as support. In this way, by using the old beams and driftwood the ship can be shaped entirely anew, but only by gradual reconstruction.