Cian Brennan argues for a version of transhumanism that incrementally applies moderate enhancements to future human beings, rather than pursuing radical enhancements in a more immediate and extreme manner. The paper begins by presenting the critique of transhumanism put forward by Johnathan Agar, which centers on the potential negative consequences of radical enhancement. The author argues that Agar’s critique is aimed at the effects of radical enhancement, rather than the concept of radical enhancement itself. By assuming that radical enhancement will be applied gradually to future generations, the author argues that weak transhumanism can overcome Agar’s objections.
The author then discusses objections to weak transhumanism, including the potential for an eventual radical enhancement to emerge and the difficulty of identifying when an enhancement becomes radical. The author responds to these objections by proposing a checklist of characteristic features that can be used to identify radical enhancements, such as the creation of new or extended abilities, changes in moral status, and significant changes in vulnerability or relatability between the enhanced and unenhanced.
Overall, the paper provides a nuanced and detailed defense of weak transhumanism, offering a way to pursue radical enhancements while avoiding some of the potential negative consequences of more radical approaches. The paper engages with a range of objections and provides a thoughtful and well-supported response to each, drawing on both philosophical and scientific sources.
The paper has implications for broader philosophical issues surrounding the ethics of human enhancement, the relationship between technology and society, and the nature of human identity and personhood. By focusing on the incremental application of enhancements, the paper raises questions about the degree to which human beings can be transformed by technology without losing their essential human nature. It also highlights the role of societal values and norms in shaping the development and application of enhancement technologies.
Future research in this area could build on the author’s checklist of characteristic features of radical enhancements, exploring the extent to which these features are necessary and sufficient conditions for defining radical enhancements. Further research could also examine the potential consequences of weak transhumanism, including the ways in which incremental enhancements may interact with each other over time and the potential for unintended consequences. Finally, future research could explore the social and cultural dimensions of transhumanism, including the ways in which transhumanist values and practices may be shaped by factors such as gender, race, and socioeconomic status.
Abstract
Transhumanism aims to bring about radical human enhancement. In ‘Truly Human Enhancement’ Agar (2014) provides a strong argument against producing radically enhancing effects in agents. This leaves the transhumanist in a quandary—how to achieve radical enhancement whilst avoiding the problem of radically enhancing effects? This paper aims to show that transhumanism can overcome the worries of radically enhancing effects by instead pursuing radical human enhancement via incremental moderate human enhancements (Weak Transhumanism). In this sense, weak transhumanism is much like traditional transhumanism in its aims, but starkly different in its execution. This version of transhumanism is weaker given the limitations brought about by having to avoid radically enhancing effects. I consider numerous objections to weak transhumanism and conclude that the account survives each one. This paper’s proposal of ‘weak transhumanism’ has the upshot of providing a way out of the ‘problem of radically enhancing effects’ for the transhumanist, but this comes at a cost—the restrictive process involved in applying multiple moderate enhancements in order to achieve radical enhancement will most likely be dissatisfying for the transhumanist, however, it is, I contend, the best option available.
Weak transhumanism: moderate enhancement as a non-radical path to radical enhancement

