What are we? Despite much discussion in historical and contemporary philosophy, we have not yet settled on an answer. A satisfactory personal ontology, an account of our metaphysical nature, will be informed by issues in the metaphysics of material objects. In the dissertation, I target two prominent materialist ontologies: animalism, the view that we are numerically identical to human organisms, and constitutionalism, the view that we are constituted by, but not identical to, human organisms. Because of the problems that arise (...) from endorsing these ontologies, I instead advance immaterialism, the view that we are essentially immaterial. In Chapter 2, I discuss how animalists must respond to a widely-discussed metaphysical puzzle, the problem of the many. This puzzle prompts some to endorse revisionary ontologies of material objects, and I argue that the animalist cannot appeal to these revisionary ontologies to solve the puzzle as it arises for personal ontology. In addition, solutions that don’t involve a commitment to revisionary ontology will be unavailable to the animalist: I argue that if animalists make use of non-revisionary solutions to the problem, they must abandon the most successful argument for their view. Absent their most successful argument, animalists will need to motivate the view in some other way. Some new arguments for animalism have been proposed, and I argue that they fail to give us reason to endorse animalism over competing ontologies. Without a strong argument, we should not prefer animalism over the other, more attractive, views. In Chapter 3, I show how constitutionalists face a different problem: explaining how the person is not the very same thing as the human organism, despite sharing the very same parts and occupying the very same physical space. We think that the person and the organism are different things because they have different modal profiles – the human organism can survive permanent loss of psychological life, but the person, presumably, cannot. Constitutionalists must then explain what grounds the difference in modal profiles, but such an explanation is hard to come by. This is an instance of the grounding problem, which is notoriously intractable. While the grounding problem is a well-known challenge to constitutional accounts of objects, I demonstrate that this puzzle is even more threatening when applied to persons. Some “solutions” to the problem fail to solve it at all, and solutions that might get the right result for ordinary objects require accepting that there are a multitude of persons where we ordinarily take there to be only one. We should not accept a personal ontology that requires a commitment to that multitude. I argue that the threat of the grounding problem is so great that we must reject the constitutionalist personal ontology. We will see from these puzzles in personal ontology that materialist solutions are either unsuccessful or yield unacceptable consequences. This should prompt us toward considering, instead, immaterialism. According to immaterialism, persons are not material objects, and the immaterialist can then provide solutions to the puzzles that threatened materialist ontologies. In Chapter 4, I outline these immaterialist solutions and show that the puzzles cannot be reinstantiated successfully against the immaterialist. I then discuss different available varieties of immaterialism and argue in defense of my preferred version. Ultimately, I argue that we are simple, immaterial entities that come into existence at the proper functioning of the brain. Endorsing this view of personal ontology permits us to adequately respond to metaphysical puzzles and retain judgments about persons that should be most important to us. In particular, the immaterialist has the resources to avoid the problem of too many thinkers and retain the judgment that there is exactly one person in circumstances where we take there to be just one. The immaterialist also has the resources to plausibly analyze thought experiments, such as cerebrum-swap cases, that threaten materialist ontologies. All things considered, it remains to be seen which personal ontology has the most evidence in its favor. In the context of debates that arise from material object metaphysics, however, evidence weighs in favor of immaterialism. Materialist personal ontologies are saddled with unacceptable responses to metaphysical puzzles, and endorsing materialism about persons requires taking on a very high cost: Either there are far more of us than we ordinarily take there to be, or there are no persons – far fewer of us than we ordinarily take there to be. Some might argue that these are the only acceptable options, so cost be damned. But we cannot afford to be so cavalier about our personal ontology. Instead, I advance immaterialist solutions to puzzles in personal ontology and propose that, in the interest of saving ourselves and everyone we love, we should seriously consider accounts according to which we are immaterial entities. (shrink)

Many Christians who argue against Christian materialism direct their arguments against what I call ‘Type-I materialism’, the thesis that I cannot exist without my organic body. I distinguish Type-I materialism from Type-II materialism, which entails only that I cannot exist without some body that supports certain mental functions. I set out a version of Type-II materialism, and argue for its superiority to Type-I materialism in an age of science. Moreover, I show that Type-II materialism can accommodate Christian doctrines like the (...) Resurrection of the Body, the Incarnation, and the intermediate state (if there is one). (shrink)

Kevin Corcoran offers an account of how one can be a physicalist about human persons, deny temporal gaps in the existence of persons, and hold that there is an afterlife. I argue that Corcoran's account both violates the necessity of metaphysical identity and implausibly makes an individual's existence dependent on factors wholly extrinsic to the individual. Corcoran's defence is considered, as well as Stephen Davis's suggestions on how an account like Corcoran's can defend itself against these concerns. It is shown, (...) however, that the difficulties remain in full force and, therefore, that Corcoran's account fails to reconcile physicalism, no gappy existence, and an afterlife. (shrink)

How should we count people who have two cerebral hemispheres that cooperate to support one mental life at the level required for personhood even though each hemisphere can be disconnected from the other and support its "own" divergent mental life at that level? On the standard method of counting people, there is only one person sitting in your chair and thinking your thoughts even if you have two cerebral hemispheres of this kind. Is this method accurate? In this paper, I (...) argue that it is not, and I advocate an alternative I call the Multiple Person View. (shrink)

In this paper, I state the what I call the “problem of life after death,” survey some responses to it, and highlight a way in which the field might progress. Put simply, the problem of life after death is the problem of reconciling the fact that when we die, we will be totally destroyed with the belief that we will exist again at some time after our deaths. Contemporary solutions to the problem have focussed on the “logical” version of this (...) problem. I highlight that the problem would be better thought of as an evidential problem. (shrink)

Peter van Inwagen’s short piece on the possibility of resurrection via simulacrum from 1978 has been regularly condemned for its overall implausibility. However, this paper argues that van Inwagen’s thesis has been unfairly criticized and remains a live and salutary option. It begins by summarizing the metaphysics of the simulacrum theory of the resurrection alongside the motivation for such a theory. Next, it challenges the four main criticisms against the van Inwagen styled simulacrum model. First, it argues that while van (...) Inwagen’s model may appear unnecessary or irrelevant for those that reject his metaphysics of human persons, an account like his is necessary for those that desire to maintain the traditional metaphysics of resurrection (e.g., the resurrection of the “self-same” body). Second, it argues that his model does not implicate God in mass deception or irreverence for the dead. Third, it rejects the idea that van Inwagen’s model is analogous to the implausibility of young earth creationism and its required claims like dinosaur bones being given the appearance of age. Fourth, it argues that his model is not metaphysically impossible for scenarios where someone is simultaneously killed and destroyed, such as in nuclear blasts. (shrink)

I argue that ensouled animalism—the view that we are identical to animals that have immaterial souls as parts—has a pair of advantages over its two nearest rivals, materialistic animalism and pure dualism. Contra pure dualism, ensouled animalism can explain how physical predications can be literally true of us. Contra materialistic animalism, ensouled animalism can explain how animals can survive death. Furthermore, ensouled animalism has these advantages without creating any problems beyond those already faced by animalism and by belief in souls. (...) However, some animalists, including Eric Olson, think that animals cannot have immaterial parts. I present a sufficient condition for animal parthood that implies animals can have immaterial parts. Ensouled animalism is not only possible, but also doubly attractive. (shrink)