Deconstruction is any of a loosely-defined set of approaches to understanding the relationship between text and meaning. The concept of deconstruction was introduced by the philosopher Jacques Derrida, who described it as a turn away from Platonism's ideas of "true" forms and essences which are valued above appearances. Since the 1980s, these proposals of language's fluidity instead of being ideally static and discernible have inspired a range of studies in the humanities, including the disciplines of law, anthropology, historiography, linguistics, sociolinguistics, psychoanalysis, LGBT studies, and feminism. Deconstruction also inspired deconstructivism in architecture and remains important within art, music, and literary criticism.
Jacques Derrida's 1967 book Of Grammatology introduced the majority of ideas influential within deconstruction. Derrida published a number of other works directly relevant to the concept of deconstruction, such as Différance, Speech and Phenomena, and Writing and Difference.
To Derrida,
That is what deconstruction is made of: not the mixture but the tension between memory, fidelity, the preservation of something that has been given to us, and, at the same time, heterogeneity, something absolutely new, and a break.
According to Derrida, and taking inspiration from the work of Ferdinand de Saussure, language as a system of signs and words only has meaning because of the contrast between these signs. As Richard Rorty contends, "words have meaning only because of contrast-effects with other words...no word can acquire meaning in the way in which philosophers from Aristotle to Bertrand Russell have hoped it might—by being the unmediated expression of something non-linguistic (e.g., an emotion, a sensed observation, a physical object, an idea, a Platonic Form)". As a consequence, meaning is never present, but rather is deferred to other signs. Derrida refers to the—in his view, mistaken—belief that there is a self-sufficient, non-deferred meaning as metaphysics of presence.