•  1525
    On the Moral Permissibility of Terraforming
    Ethics and the Environment 18 (2): 1-31. 2013.
    Terraforming is a process of planetary engineering by which the extant environment of a planetary body is transformed into an environment capable of supporting human inhabitants. The question I would like to consider in this paper is whether there is any reason to believe that the terraforming of another planet—for instance, the terraforming of Mars—is morally problematic. Topics related to the human exploration of space are not often discussed in philosophical circles. Nevertheless, there exist…Read more
  •  277
    Our Moral Obligation to Support Space Exploration
    Environmental Ethics 33 (1): 67-88. 2011.
    The moral obligation to support space exploration follows from our obligations to protect the environment and to survive as a species. It can be justified through three related arguments: one supporting space exploration as necessary for acquiring resources, and two illustrating the need for space technology in order to combat extraterrestrial threats such as meteorite impacts. Three sorts of objections have been raised against this obligation. The first are objections alleging that supporting s…Read more
  •  79
    The Great Colonization Debate
    with Kelly C. Smith, Keith Abney, Gregory Anderson, Linda Billings, Carl L. DeVito, Brian Patrick Green, Alan R. Johnson, Lori Marino, Gonzalo Munevar, Michael P. Oman-Reagan, Adam Potthast, Koji Tachibana, John W. Traphagan, and Sheri Wells-Jensen
    Futures 110 4-14. 2019.
    Click on the DOI link to access the article.
  •  61
    Mathematical Structuralism, Modal Nominalism, and the Coherence Principle
    Philosophia Mathematica 23 (3): 367-385. 2015.
    According to Stewart Shapiro's coherence principle, structures exist whenever they can be coherently described. I argue that Shapiro's attempts to justify this principle are circular, as he relies on criticisms of modal nominalism which presuppose the coherence principle. I argue further that when the coherence principle is not presupposed, his reasoning more strongly supports modal nominalism than ante rem structuralism
  •  58
    The Ethics of Space Exploration (edited book)
    Springer. 2016.
    This book aims to contribute significantly to the understanding of issues of value which repeatedly emerge in interdisciplinary discussions on space and society. Although a recurring feature of discussions about space in the humanities, the treatment of value questions has tended to be patchy, of uneven quality and even, on occasion, idiosyncratic rather than drawing upon a close familiarity with state-of-the-art ethical theory. One of the volume's aims is to promote a more robust and theoretica…Read more
  •  16
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  •  11
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  •  10
    Space settlement: What's the Rush?
    Futures. forthcoming.
    Click on the DOI link to access the article.
  •  7
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  •  5
    We only see Mars from Earth's perspective in the first season of The Expanse, but Season 2 changes that by introducing Gunnery Sergeant Bobbie Draper, a Martian Congressional Republic Navy (MCRN) marine. Mars as seen by Martians resembles our Mars: ruddy, rocky, dusty, inhospitable, and cold. This chapter focuses on Draper and the Mars Congressional Republic (MCR). What is striking about the culture of the MCR is how naturally it flows from contemporary visions of space exploration, especially t…Read more
  •  5
    The Value of Science in Space Exploration
    Oxford University Press. 2020.
    "The Value of Space Science provides a rigorous assessment of the value of scientific knowledge and understanding in the context of contemporary space exploration. It argues that traditional spaceflight rationales are deficient, and that the strongest defense of spaceflight comes from its potential to produce intrinsically and instrumentally valuable knowledge and understanding. It engages with contemporary epistemology to articulate an account of the intrinsic value of scientific knowledge and …Read more
  •  4
    Editorial: To: The editor of JBIS, 26 July 2018
    British Interplanetary Society 71 (10): 359-360. 2018.
    Letter to the editor. Click on the URI to access the article.