Neil Harbisson cannot see colors.
He was born with achromatopsia, a known condition in which the cone cells responsible for color perception are absent or non-functional, leaving the world in shades of gray. In 2004, a chip was implanted in his skull that converts light frequencies into sound vibrations delivered through bone conduction directly to his auditory system. He now perceives color as sound: each wavelength of light produces a note, and the full visible spectrum produces what he describes as a continuous musical experience of the visual world.
In 2004, when Harbisson applied to renew his passport, the UK Passport Office initially refused to include his photograph because the antenna extending from the back of his skull violated the rules against accessories in official photographs. Harbisson appealed on the grounds that the antenna was not an accessory but a part of his body. The UK government accepted the argument.
Neil Harbisson is recorded as the first person officially recognized as a cyborg by a government.
He is not an experiment. He is not a science fiction character. He is a real living person whose experience of the world is mediated by a technology integrated into his biology in a way that a government body has formally acknowledged as constitutive of his physical identity.

Whether this recognition represents the threshold moment at which the boundary between human biology and human technology was legally acknowledged as permeable, or a bureaucratic accommodation of an unusual individual case without broader institutional implications, is the question that the Harbisson passport decision raises.
Whatever the answer, Kevin Warwick got there first.
Kevin Warwick and the Recorded Experiments
Kevin Warwick is a professor of Cybernetics at the University of Reading whose self-experimentation represents the most rigorous academic engagement with human-machine biological integration in the research record.
In 1998, Warwick had a simple RFID chip implanted in his left arm that allowed him to interact with the Reading University building systems: doors opened as he approached, lights activated, and his computer greeted him on arrival. The experiment was recorded as a proof of concept for the integration of building systems with human biological identity rather than with external devices.
In 2002, Warwick underwent a more complex experiment whose character advances beyond simple RFID identification: a hundred-electrode array was implanted into the median nerve of his left wrist, directly interfacing with his nervous system. The experiments that followed included transmitting his own nervous system signals across the internet to move a robotic arm in New York while Warwick was in the United Kingdom, and allowing his wife Irena, who had a simpler implant in her own arm, to generate sensation in Kevin’s nervous system through her own movements.

Whether this direct nervous system communication between two human beings, mediated by implanted electrodes and internet transmission, constitutes the first recorded case of direct human-to-human electronic nervous system communication is the historical claim that Warwick’s experiment motivates examining.
The stated institutional purpose of the experiments was not cyborg aesthetics but medical application: understanding how the nervous system’s electrical signals can be captured, transmitted, and reintroduced to develop prosthetic limbs for amputees and spinal cord injury patients that respond to the user’s own nerve signals rather than to mechanical switches.
Whether the medical application justification was the primary motivation for the experiments, or provided the institutional framework within which Warwick’s own interest in human-machine integration could be pursued, is a question that the experiments’ own character suggests only Warwick can answer.
Nick Bostrom’s Dual Role
Nick Bostrom occupies a position in the library’s framework that the transhumanism piece is uniquely placed to develop: he is simultaneously the architect of the simulation argument recorded in the library’s dedicated piece and the founder of the World Transhumanist Association, subsequently renamed Humanity Plus.
The irony of this dual role is analytically interesting: the philosopher who argues that we are probably living in a simulation created by a technologically advanced civilization is also the philosopher who advocates using technology to create a technologically advanced civilization capable of running simulations.

Whether Bostrom considers these two positions complementary, in which the simulation argument establishes what sufficiently advanced civilizations can do and the transhumanist program describes how to become one, or whether he considers them independent intellectual projects whose relationship is coincidental, is a question that his public statements address but do not fully resolve.
His stated position on the relationship between the simulation argument and transhumanism is that they are separate philosophical investigations rather than a unified program. Whether the logical structure of his positions supports or undermines this separation is the analytical question the dual role raises.
What Bostrom’s dual role establishes for the library’s framework is that the question of what consciousness is, which the simulation argument addresses from the philosophical direction, and the question of what consciousness can become, which the transhumanist program addresses from the technological direction, are connected through the person who has developed both frameworks most systematically in the academic literature.
The Enhancement Trajectory and Its Recorded Stages
The recorded trajectory of human-technology integration follows a developmental sequence whose current stage the Harbisson and Warwick examples represent and whose future stages the transhumanist research program is working toward.
The first recorded stage, currently operational, is therapeutic restoration: using technology to restore capabilities that biological failure or injury has removed. Cochlear implants restoring hearing, retinal implants restoring partial vision, and deep brain stimulation managing Parkinson’s symptoms are established medical applications whose evidentiary basis is confirmed in the peer-reviewed medical literature.
The second recorded stage, currently operational in experimental form, is capability extension: using technology to provide capabilities beyond the normal human biological range. Harbisson’s color-sound translation and Warwick’s nervous system internet connection are the clearest examples whose institutional recognition establishes the stage’s reality.
The third recorded stage, currently in research development, is cognitive enhancement: using brain-machine interfaces to augment memory, processing speed, or access to external information systems. Neuralink’s confirmed therapeutic applications for paralysis and neurodegenerative disease represent the research foundation whose extension to cognitive enhancement is the next step the transhumanist program anticipates.
The fourth recorded stage, currently theoretical but with established research foundations, is consciousness uploading: the transfer of the information pattern that constitutes individual consciousness to a substrate other than biological neurons. Hannah Critchlow’s Cambridge statement about brain uploading requiring computers with 100 trillion connections, recorded in the library’s cyborg piece assessment, represents the technical threshold estimate from a credentialed neuroscientist.

Whether each stage transition represents a quantitative change in the human-technology relationship or a qualitative threshold crossing whose character changes what it means to be human, is the philosophical question that this stage sequence motivates without the available evidence resolving.
The Inequality Problem
The recorded concern that enhancement technologies will be available only to wealthy populations before becoming generally accessible, and that the period of differential access will produce biological inequality of a kind unprecedented in human history, is the political dimension of the transhumanist trajectory whose development the library’s Esoteric Power cluster most directly motivates.
Harari’s recorded statement about biological inequality, that if only the wealthy can afford the privilege of living longer or accessing enhanced capabilities while the rest of humanity remains biologically unenhanced, the social gap could become insurmountable, describes the mechanism by which the transhumanist trajectory could reproduce the well established historical pattern of elite technological advantage in its most biologically consequential form.
The recorded history of technology diffusion generally shows that capabilities first available only to wealthy populations eventually become more widely accessible: mobile phones, once luxury items, are now owned by the majority of the global population. Whether biological enhancement technologies follow this diffusion trajectory or represent a category whose character, the irreversible biological modification of individuals rather than the provision of external devices, produces permanently stratified outcomes, is the question that distinguishes transhumanism’s inequality risk from the standard technology diffusion pattern.
A smartphone can be upgraded or replaced. Biological modification integrated into the nervous system, the genome, or the brain architecture, is substantially less reversible than an external device. Whether the irreversibility of biological enhancement creates permanent biological stratification between enhanced and unenhanced populations, or whether the standard technology diffusion trajectory applies at a slower timescale, is the empirical question that the early stage of the enhancement program does not yet allow to answer.
The parallel between the transhumanist inequality concern and the Esoteric Power cluster’s treatment of elite access to esoteric knowledge and technology is the connection whose development gives the transhumanism piece its most library significance: the ancient recurring pattern of elite access to capabilities denied to the general population, whose expression in the Tesla, Manly Hall, and Vatican pieces is esoteric and technological, finds its most contemporary expression in the recorded trajectory of biological enhancement whose institutional dynamics the bioethics literature is beginning to examine.
What the Cyborg Threshold Means
The moment when Neil Harbisson’s government recognized his antenna as part of his body, rather than as an accessory that could be removed for a photograph, is the recorded institutional acknowledgment that the boundary between human biology and human technology is permeable in a way that has legal consequences.

Whether this acknowledgment represents the beginning of the transition that Dick’s post-biological universe framework describes as the inevitable trajectory of any sufficiently advanced technological civilization, the crossing point at which the biological and the artificial begin their recorded convergence, or a bureaucratic accommodation without the broader institutional significance the transhumanist program attributes to it, is the question that the Harbisson passport decision raises.
Kevin Warwick’s nervous system communicates across the internet. Neil Harbisson hears the electromagnetic spectrum. Nick Bostrom argues the civilization capable of creating us is already post-biological and that we should become one ourselves.
The chip is in the skull. The antenna is on the passport. The array is in the median nerve.
Whatever humanity is becoming, it has already started.