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The Tractus Logico-Philosophicus written by Ludwig Wittgenstein is a philosophical work that attempts to identify the relation between language and reality and to define the limits of science. Summary Of The Book Tractus Logico-Philosophicus is an expression of what the wod is made up of, how language is crucial for logical description and how anything that speaks of the world in a general light is nonsense. The book begins with talking of ontology i.e.what makes up the world. Simple objects build up reality and it is these objects that combine to form the state of affairs, which further make up the world. The logical form of objects determines the ways in which they can form states of affairs. These objects together create a chain like formation in the states of affairs. This would simply mean that the logical form of these objects holds them together and they do not need the support of anything else to bind them to the chain. Later Tractus Logico-Philosophicus talks of how language helps describe the world precisely. The author believes that language is made of complex propositions that are derived from basic, elementary propositions. These basic propositions can not be analyzed on their own as they consist solely of names. Moreover, signs derive meanings when they are used in a proposition. Therefore, the same sign could mean different things in different propositions. It speaks of how language is more important than pictures to describe the world as it can help explain the logical form. It is hard to identify the logical form of a proposition or fact is but this logical form is reflected in the way the form or proposition depicts itself. Philosophical problems arise because of people trying to speak of things that can only be depicted. An example of this such a thing can be the form of the world. The author differentiates between concepts that are formal, which we cannot speak about and concepts that are proper, which legitimately constitute propositions. The author also discusses the type of propositions and how new propositions can be derived from old ones through operations. The work also claims that the laws of science are not logical laws, nor are they empirical observations. They are only descriptive, not explanatory. The book concludes by ironically quoting that anything that talks of the world generally, including the Tractus is nonsense as the world cannot be spoken of as  whole. This book was first published in German as Logisch-Philosophische Abhandlung. It influenced greatly the logical positivists of the Vienna Circle. It has been recognized as a significant philosophical work of the twentieth century. About Ludwig Wittgenstein Ludwig Wittgenstein was an Austrian British philosopher who worked primarily in logic, the philosophy of mathematica and the philosophy of language. The Tractatus Logico-Philosophicus was the only book length philosophical work published by him during his lifetime, written in jail after the First World War. His later works include The Blue and Brown Books, Remarks on Colour/Bemerkungen Uber Die Farben, among others. He had a flair for irony, which is also evident in the fact that his later works, especially the Philosophical Investigations, criticized many of the ideas of Tractatus Logico-Philosophicus. Wittgenstein studied mechanical engineering and also attended the Cambridge University. He was deeply influenced by the Austrian philosopher Otto Weininger as a child.