Tractatus Logico-PhilosophicusMore than a century after its composition, Tractatus Logico Philosophicus Wittgenstein's first masterwork, and the only book he published during his lifetime endures as the definitive modern text on what logic can and cannot do. Since its first English language publication in 1922, this profoundly enigmatic work has inspired philosophers and non philosophers alike. Consisting of 525 hierarchically numbered statements, each one "self evident,"