•  117
    The Competition of Ideas: Market or Garden?
    Critical Review of International Social and Political Philosophy 4 (2): 45-58. 2001.
    The ‘marketplace of ideas’ is an influential metaphor with widespread currency in debates about freedom of speech. We explore a number of ways competition between ideas might be described as occurring in a marketplace and find that none support the use of the metaphor. We suggest that an alternative metaphor, that of the ‘garden of ideas’, may offer more productive insights into issues surrounding the regulation of speech.
  •  305
    Drones, courage, and military culture
    In George R. Jr Lucas (ed.), Routledge Handbook of Military Ethics, Routledge. pp. 380-394. 2015.
    In so far as long-range tele-operated weapons, such as the United States’ Predator and Reaper drones, allow their operators to fight wars in what appears to be complete safety, thousands of kilometres removed from those whom they target and kill, it is unclear whether drone operators either require courage or have the opportunity to develop or exercise it. This chapter investigates the implications of the development of tele-operated warfare for the extent to which courage will remain central t…Read more
  •  221
    ‘Terraforming’ is hypothetical climatic and geo-physical engineering of other planets on a grand scale, with the aim of turning the so-called ‘barren’ planets in our (or for that matter another) solar system into habitable earth-like eco-systems. Although terraforming sounds like an idea from science fiction (where it indeed has appeared), it has been seriously proposed as a future project for the human race. With such a technology we could colonise the solar system and perhaps eventually others…Read more
  •  15
    The Dead Donor Rule and Means-End Reasoning - A Reply to Napier
    Cambridge Quarterly of Healthcare Ethics 21 (1): 141-146. 2012.
  •  43
    Beyond Humanity? The Ethics of Biomedical Enhancement – By A. Buchanan (review)
    Journal of Applied Philosophy 29 (2): 160-162. 2012.
  •  66
    Queerin’ the PGD Clinic: Human Enhancement and the Future of Bodily Diversity
    Journal of Medical Humanities 34 (2): 177-196. 2013.
    Disability activists influenced by queer theory and advocates of “human enhancement” have each disputed the idea that what is “normal” is normatively significant, which currently plays a key role in the regulation of pre-implantation genetic diagnosis (PGD). Previously, I have argued that the only way to avoid the implication that parents have strong reasons to select children of one sex (most plausibly, female) over the other is to affirm the moral significance of sexually dimorphic human biolo…Read more
  •  96
    Ravelingien et al have suggested that early human xenotransplantation trials should be carried out on patients who are in a permanent vegetative state (PVS) and who have previously granted their consent to the use of their bodies in such research in the event of their cortical death. Unfortunately, their philosophical defence of this suggestion is unsatisfactory in its current formulation, as it equivocates on the key question of the status of patients who are in a PVS. The solution proposed by …Read more
  •  166
    Since the 1980s, a number of medical researchers have suggested that in the future it might be possible for men to become pregnant. Given the role played by the right to reproductive liberty in other debates about reproductive technologies, it will be extremely difficult to deny that this right extends to include male pregnancy. However, this constitutes a reductio ad absurdum of the idea of reproductive liberty. One therefore would be well advised to look again at the extent of this purported r…Read more
  •  64
    Armed military robots: editorial
    with Jürgen Altmann, Peter Asaro, and Noel Sharkey
    Ethics and Information Technology 15 (2): 73-76. 2013.
    Arming uninhabited vehicles is an increasing trend. Widespread deployment can bring dangers for arms-control agreements and international humanitarian law. Armed UVs can destabilise the situation between potential opponents. Smaller systems can be used for terrorism. Using a systematic definition existing international regulation of armed UVs in the fields of arms control, export control and transparency measures is reviewed; these partly include armed UVs, but leave large gaps. For preventive a…Read more