Ludwig Wittgenstein wrote Tractatus Logico Philosophicus (Logical-Philosophical Treatise) whilst a soldier and latterly a Prisoner of War during WW1. Despite the chaos and horrors of his surroundings, Wittgenstein created one of the purest and most insightful works of philosophical reason of his time, and arguably since. Whilst concentrating on the ability of language to accurately portray the world of reason, Wittgenstein applies his notoriously uncompromising logic to wider philosophical issues of ethics, physics and even mystical thought. A 13-page preface and overview by Bertrand Russell is a valuable key for the reader to unlock Wittgenstein's powerful message. This edition is an English-only version.