Graylingstein: Wittgenstein on Scepticism and Certainty Descartes last book was Passions of the Mind. Underlying all the talk of morals, he seemed concerned whether he WANTED his theory of innate ideas to be right and that this was the cause of his previous conclusions. Now Kant's last major work was Conflict of the Faculties, in which he too seems concerned that his previous conclusions were motivated by desire and now found himself trapped in contradictions. Wittgenstein, now we can say, tried to overturn his previous philosophy by coming up with a new system, for which he should be praised. It is questionable though if he anything meaningful to say about philosophy apart from the conviction that philosophy leads to no truths. I for one don't read much at all from Wittgenstein because he doesn't try to draw conclusions and find a final Ethos