Widely regarded as one of the most influential philosophical works of the twentieth century, Tractatus Logico-Philosophicus is a succinct yet wide-ranging exploration of language and logic; of what can be said, and what can only be shown. In a series of short, bold statements, Ludwig Wittgenstein seeks to define the limits of meaningful expression. His treatise's austere beauty - along with its famous 'picture theory' of meaning - has inspired generations of thinkers, artists, novelists and musicians since its original publication in the early 1920s. It is the only book-length work he published in his lifetime.