Posthuman or post-human is a concept originating in the fields of science fiction, futurology, contemporary art, and philosophy that literally means a person or entity that exists in a state beyond being human. The concept addresses questions of ethics and justice, language and trans-species communication, social systems, and the intellectual aspirations of interdisciplinarity. "Posthumanism" is not to be confused with "transhumanism" (the biotechnological enhancement of human beings) and narrow definitions of the posthuman as the hoped-for transcendence of materiality.

In critical theory, the posthuman is a speculative being that represents or seeks to re-conceive the human. It is the object of posthumanist criticism, which critically questions Renaissance humanism, a branch of humanist philosophy which claims that human nature is a universal state from which the human being emerges; human nature is autonomous, rational, capable of free will, and unified in itself as the apex of existence. Thus, the posthuman position recognizes imperfectability and disunity within him or herself, and understands the world through heterogeneous perspectives while seeking to maintain intellectual rigour and a dedication to objective observations. Key to this posthuman practice is the ability to fluidly change perspectives and manifest oneself through different identities. The posthuman, for critical theorists of the subject, has an emergent ontology rather than a stable one; in other words, the posthuman is not a singular, defined individual, but rather one who can "become" or embody different identities and understand the world from multiple, heterogeneous perspectives.[1]

Steve Nichols published the Post-Human Manifesto in 1988, and holds a contrarian view that human beings are already post-human compared to previous generations.[citation needed]

Critical discourses surrounding posthumanism are not homogeneous, but in fact present a series of often contradictory ideas, and the term itself is contested, with one of the foremost authors associated with posthumanism, Manuel de Landa, decrying the term as "very silly."[2] Covering the ideas of, for example, Pepperell's The Posthuman Condition, and Hayles's How We Became Posthuman under a single term is distinctly problematic due to these contradictions.

The posthuman is roughly synonymous with the "cyborg" of A Cyborg Manifesto by Donna Haraway.[3] Haraway's conception of the cyborg is an ironic take on traditional conceptions of the cyborg that inverts the traditional trope of the cyborg whose presence questions the salient line between humans and robots. Haraway's cyborg is in many ways the "beta" version of the posthuman, as her cyborg theory prompted the issue to be taken up in critical theory.[4]

Following Haraway, Hayles, whose work grounds much of the critical posthuman discourse, asserts that liberal humanism - which separates the mind from the body and thus portrays the body as a "shell" or vehicle for the mind - becomes increasingly complicated in the late 20th and 21st centuries because information technology put the human body in question. Hayles maintains that we must be conscious of information technological advancements while understanding information as "disembodied," that is, something which cannot fundamentally replace the human body but can only be incorporated into it and human life practices.[5]

The posthuman is a being that relies on context rather than relativity, on situated objectivity rather than universal objectivity, and on the creation of meaning through 'play' between constructions of informational pattern and reductions to the randomness of on-off switches, which are the foundation of digital binary systems.[citation needed]

According to transhumanist thinkers, a posthuman is a hypothetical future being "whose basic capacities so radically exceed those of present humans as to be no longer unambiguously human by our current standards."[6]

Posthumans could be completely synthetic artificial intelligences, or a symbiosis of human and artificial intelligence, or uploaded consciousnesses, or the result of making many smaller but cumulatively profound technological augmentations to a biological human, i.e. a cyborg. Some examples of the latter are redesigning the human organism using advanced nanotechnology or radical enhancement using some combination of technologies such as genetic engineering, psychopharmacology, life extension therapies, neural interfaces, advanced information management tools, memory enhancing drugs, wearable or implanted computers, and cognitive techniques.[6]

As used in this article, "posthuman" does not necessarily refer to a conjectured future where humans are extinct or otherwise absent from the Earth. As with other species who speciate from one another, both humans and posthumans could continue to exist. However, the apocalyptic scenario appears to be a viewpoint shared among a minority of transhumanists such as Marvin Minsky[citation needed] and Hans Moravec, who could be considered misanthropes, at least in regards to humanity in its current state. Alternatively, others such as Kevin Warwick argue for the likelihood that both humans and posthumans will continue to exist but the latter will predominate in society over the former because of their abilities.[7] Recently, scholars have begun to speculate that posthumanism provides an alternative analysis of apocalyptic cinema and fiction, often casting vampires, werewolves and even zombies as potential evolutions of the human form and being.[8]

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