Wittgenstein's Tractatus - the only book he actually published within his lifetime - was an immensely important work which changed the direction of philosophy in the first half of the twentieth century. Highlighting the importance of the nature of language in philosophy and the problematic nature of metaphysics, it strongly influenced the work of Russell, the Vienna Circle and A. J. Ayer. An understanding of the ideas in the Tractatus is essential to fully grasp Wittgenstein's remarkable thought.

In Wittgenstein's 'Tractatus Logico-Philosophicus': A Reader's...