The singularity hypothesis is a radical hypothesis about the future of artificial intelligence on which self-improving artificial agents will quickly become orders of magnitude more intelligent than the average human. Despite the ambitiousness of its claims, the singularity hypothesis has been defended at length by leading philosophers and artificial intelligence researchers. In this paper, I argue that the singularity hypothesis rests on scientifically implausible growth assumptions. I show how leading philosophical defenses of the singularity hypothesis (Chalmers 2010, Bostrom 2014) fail (...) to overcome the case for skepticism. I conclude by drawing out philosophical implications of this discussion for our understanding of consciousness, personal identity, digital minds, existential risk, and ethical longtermism. GPI Working Paper No . 19-2022. (shrink)

Philosophy &Public Affairs, Volume 51, Issue 4, Page 373-412, Fall 2023.

In this article, part of a special issue on meaning in life and medical ethics, I argue that several issues encountered in a bioethical context are not adequately addressed only with values such as morality and welfare. I maintain, more specifically, that the value of what makes a life meaningful is essential to being able to provide conclusive judgements about which decisions to make. After briefly indicating how meaningfulness differs from rightness and happiness, I point out how it is plausibly (...) central to making decisions in six ‘life and death’ matters. My aim is not to draw any firm conclusions about what to do when it comes to these topics, but rather to show that in order to arrive at any, one cannot plausibly ignore the category of life’s meaning that has, until recently, been nearly absent from Western bioethics since its inception. (shrink)

A 10,000+ word critical overview of analytic philosophy devoted to life's meaning, with some focus on books and more recent works.

Life is a self-maintaining process based on metabolism. Something is said to be alive when it exhibits organization and is actively involved in its own continued existence through carrying out metabolic processes. A life is a spatio-temporally restricted event, which continues while the life processes are occurring in a particular chunk of matter (or, arguably, when they are temporally suspended, but can be restarted at any moment), even though there is continuous replacement of parts. Life is organized in discrete packages, (...) particular cells and multicellular organisms with differing degrees of individuality. Biological species, too, have been shown to be individuals, and not classes, as these collections of organisms are spatio-temporally localized, restricted, continuous, and somewhat cohesive entities, with a definite beginning and end. Assuming that all life on Earth has a common origin, all living organisms, cells, and tissues descending from this origin exhibit continuity of the life processes at the cellular level, as well as many of the features that define the individual character of species: spatio-temporal localization and restriction, continuity, historicity, and cohesiveness. Therefore, life on Earth is an ontological individual. Independent origins of life will have produced other such individuals. These provisionally called ‘life-individuals’ constitute a category of organization of life which has seldom been recognized. The discovery of at least one independent life-individual would go a long way toward the project of the universality of biology. (shrink)

I describe a distinctive kind of fear that is generated by a vivid recognition of one’s mortal nature. I name it ‘existential shock’. This special fear does not take our future annihilation as any kind of harm, whether intrinsic or extrinsic. One puzzling feature of existential shock is that it is experienced as disclosing an important truth, yet attempts to specify this revelatory content bring us back to familiar facts about one’s inevitable death. But how can I discover something that (...) I already knew? I argue that in our everyday lives, we are in the grip of deeply entrenched patterns of thought and feeling that prevent the knowledge of our mortality from being fully assimilated. Rather, we merely ‘pay lip service’ to the facts of our mortality. I propose that existential shock involves a distinctive mode of presentation of oneself as a mortal being, in a way that cuts through subtle layers of denial that govern our lives. I develop this thesis by utilizing and synthesizing ideas from several traditions, including the work of Samuel Scheffler, Mark Johnston, Martin Heidegger, and Jay L. Garfield. (shrink)

A 3,500 word overview of 21st century Anglo-American philosophical books devoted to the question of what, if anything, would make life meaningful.

I suggest a way in which metaphysics might cure us of our desire for immortality. Supposing that time is composed of instants, or even that time could be composed of instants, leads to the conclusion that there is nothing good that immortality offers, nothing we might reasonably want, that is in principle unavailable to a mere mortal. My argument proceeds in three stages. First, I suggest a necessary condition for a feature to ground the desirability of a life or a (...) portion thereof. Second, after distinguishing between three different features that could plausibly be meant by ’immortality’, I argue that if time could be composed of instants, only one of those features satisfies the necessary condition, and it evidently fails to ground the desirability of a life. Third, I argue that no feature that entails any of the three features grounds the desirability of a life either. I conclude with reflections on what this means for our longing for immortality. (shrink)

Many major historical figures in philosophy have provided an answer to the question of what, if anything, makes life meaningful, although they typically have not put it in these terms. Consider, for instance, Aristotle on the human function, Aquinas on the beatific vision, and Kant on the highest good. While these concepts have some bearing on happiness and morality, they are straightforwardly construed as accounts of which final ends a person ought to realize in order to have a significant existence. (...) Despite the venerable pedigree, it is only in the last 50 years or so that something approaching a distinct field on the meaning of life has been established in analytic philosophy, and it is only in the last 25 years that debate with real depth has appeared. Concomitant with the demise of positivism and of utilitarianism in the post-war era has been the rise of analytical enquiry into non-hedonistic conceptions of value grounded on relatively uncontroversial (but not universally shared) judgments or “intuitions,” including conceptions of meaning in life. Englishspeaking philosophers can be expected to continue to find life's meaning of interest as they increasingly realize that it is a distinct line of enquiry that admits of rational enquiry to no less a degree than more familiar normative categories such as well-being, right action, and distributive justice. (shrink)