Research
I work on several different interconnected areas, dipping in and out of these topics over the years. The overall question that guides my research is how humans can form beliefs in domains that are remote from everyday concerns, such as mathematics, theology, and science. I'm interested in why humans across cultures reach for things beyond those of immediate survival- and reproduction-related concerns, things that awe, delight, and inspire us.
My areas of specialization are philosophy of cognitive science, philosophy of religion, and experimental philosophy.
Below are a selection of papers and books for each area of interest. A full list of publications can be found on my CV.
Awe, wonder, and philosophical imagination
Philosophy is born in wonder. We are driven by our epistemic emotions, such as wonder, awe, and curiosity, and these stir the imagination, opening up paths to inquiry. I am currently working on a monograph on wonder and awe, and have several published pieces on philosophical imagination and thought experiments.
- De Cruz, H. (2022). Philosophy Illustrated: 42 thought experiments to broaden your mind. Oxford: Oxford University Press.
This is an edited volume with 42 illustrations I made of philosophical thought experiments. The volume aims to show both how thought experiments help to stir our philosophical imagination, and how pictures can further help us to philosophize. Each picture has a commentary by an expert on the significance of the thought experiment, in some cases, written by the author of the original thought experiment.
- De Cruz, H. (2020). The necessity of awe. Aeon.
A short public philosophy piece on the importance of awe in scientific creativity.
- De Cruz, H. (2020). Awe and wonder in scientific practice: Implications for the relationship between science and religion.. In: M. Fuller, D. Evers, A. Runehov, K.-W. Sæther, and B. Michollet (Eds.)., Issues in science and theology: Nature – and Beyond (pp. 155-168). Cham: Springer
This paper examines the role of awe and wonder in scientific practice. Drawing on evidence from psychological research and the writings of scientists and science communicators, I argue that awe and wonder play a crucial role in scientific discovery.
- De Cruz, H. (2015). Where philosophical intuitions come from. Australasian Journal of Philosophy, 93, 233 - 249.
I argue that many philosophical intuitions originate from spontaneous, early-developing, cognitive processes that also play a role in other cognitive domains. Additionally, they have a skilled, practiced, component.
Philosophy through fiction
Philosophy can be done in a variety of formats. We can philosophize in poetry, fiction, visual art, film, video games, and many other ways. I aim to expand the range of philosophical formats in which we can express ourselves. I aim to facilitate ways to broaden the philosophical discussion.
- De Cruz, H., De Smedt, J., & Schwitzgebel, E. (2021). Philosophy and science fiction stories. Exploring the boundaries of the possible. Bloomsbury Academic.
A collection of eleven short stories with deep philosophical significance by award-winning SF authors and philosophers.
The Introduction to this edited volume is a story co-written by Eric Schwitzgebel, Johan De Smedt, and me, and explores three possible positions about how philosophy can de done through fiction. A draft version of this Introduction can be found here.
- De Smedt, J. & De Cruz, H. (2015). The epistemic value of speculative fiction. Midwest Studies in Philosophy, XXXIX, 58 - 77.
Speculative fiction, such as science fiction and fantasy, has a unique epistemic value. We examine similarities and differences between speculative fiction and philosophical thought experiments in terms of how they are cognitively processed.
Cognitive science of religion and its theological implications
The cognitive science of religion (CSR) is a multidisciplinary field that examines how people form religious beliefs and engage in religious practices, by appeal to ordinary (non-religion-specific) cognitive processes and evolutionary pressures. I examine what implications we should draw for perennial philosophical questions such as the justification of religious beliefs.
- De Cruz, H. (2018). Etiological challenges to religious practices. American Philosophical Quarterly, 55 (4): 329 - 340.
I examine whether etiological accounts affect the rationality of religious practices, looking at two influential evolutionary accounts of ritual, the hazard-precaution model and costly signaling theory.
- De Cruz, H. & De Smedt, J. (2017). Intuitions and arguments: Cognitive foundations of argumentation in natural theology. European Journal for Philosophy of Religion, 9, 57 - 82.
This paper examines the cognitive foundations of natural theology: the intuitions that provide the raw materials for religious arguments, and the social context in which they are defended or challenged.
- De Cruz, H., & Nichols, R. T. (2016). Advances in Religion, Cognitive Science, and Experimental Philosophy. Bloomsbury Academic.
This is the first edited volume to comprehensively deal with the emerging field of experimental philosophy of religion.
- De Cruz, H. and De Smedt, J. (2015). A natural history of natural theology. The cognitive science of theology and philosophy of religion. MIT Press.
In this monograph, we survey eight theistic arguments, including the argument from design, the cosmological argument, and the argument from miracles. We probe the cognitive origins of these arguments and examine the implications for philosophy of religion.
- De Cruz, H. (2015). Divine hiddenness and the cognitive science of religion. In A. Green and E. Stump (Eds.), Hidden divinity and religious belief (pp. 53-68). Cambridge: Cambridge University Press.
An examination of how cognitive science of religion can shed light on the problem of divine hiddenness.
- De Cruz, H. (2014). Cognitive science of religion and the study of theological concepts. Topoi. An International Review of Philosophy, 33, 487--497.
An examination of how the cognitive science of religion can shed light on the origin and success of theological concepts, not just folk religious concepts, with a focus on afterlife beliefs and how we appraise natural theological arguments.
- De Cruz, H. (2014). The enduring appeal of natural theological arguments. Philosophy Compass, 9, 145 - 153.
A review article on natural theological arguments and their cognitive basis.
- De Cruz, H. & De Smedt, J. (2013). Reformed and evolutionary epistemology, and the noetic effects of sin. International Journal for Philosophy of Religion, 74, 49 - 66.
This paper examines intriguing similarities between deficiencies in our cognitive apparatus that are proposed in Reformed and evolutionary epistemology, and critiques Reformed epistemology for the incoherence of its concept of noetic effects of sin.
Experimental philosophy of religion
- De Cruz, H. (2020). Philosophy of religion from the margins: A theoretical analysis and focus group study. In: B. Hereth and K. Timpe (Eds.), The lost sheep in philosophy of religion: New perspectives on disability, gender, race, and animals (pp.31--54). New York and London: Routledge.
This is a qualitative focus-group study of how being a minority in philosophy of religion, intersectionally understood, affects one's work, approaches and topics.
- De Cruz, H. (2018). Religious beliefs and philosophical views: a qualitative study. Res Philosophica, 95 (3): 477 - 504.
This is a qualitative survey study among professional philosophers of religion, probing how their philosophical views are influenced by what philosophers call "irrelevant factors," such as the religion they grew up with, and their education.
- De Cruz, H. (2017). Religious disagreement: A study among academic philosophers. Episteme, 14, 71 - 87.
This is a quantitative survey study examining how academic philosophers conceive of religious disagreement, whether their religious beliefs affect how they approach philosophical disagreements about religion (spoiler alert: they do!)
Other work in philosophy of religion (notably, epistemology and science and religion)
- De Smedt, J. and De Cruz, H. (2020). The challenge of evolution to religion. Cambridge University Press.
A short monograph (about 33,000 words) on how evolution poses a challenge to religion. It focuses on the relationship between science and religion and how evolution fits into the debate, and then presents three case studies: teleology, human origins, and the origins of religion to flesh out this relationship.
- De Cruz, H. (2019). Religious Disagreement. Cambridge University Press.
A short monograph (about 30,000 words) on religious disagreement, focusing on disagreement with friends, with your former self, with experts, and on the importance of agreement. Proposes a conciliationist approach to religious disagreement (i.e., if you disagree with someone about religion this fact of disagreement constitutes significant higher-order evidence and should be accorded significant weight).
- De Cruz, H. (2018). Religious conversion, transformative experience, and disagreement. Philosophia Christi, 20 (1): 265 - 275.
Religious conversion gives rise to disagreement with one’s former self and with family and friends. Through Augustine’s De Utilitate Credendi (The Usefulness of Belief) I show that reasoned argument should play a crucial role in assessing the evidential value of religious conversions, both for the person who converts and for her (former) peers.
- De Cruz, H. (2017). [Religion and Science [sep1]. Stanford Encyclopedia of Philosophy
A 15,000-word encyclopedic survey on the relationship between religion and sicence.
The cognitive basis of mathematics
Mathematics is the quest for patterns. What are the implications of the sciences of the mind for perennial questions in mathematics? I aim to answer these questions, looking at the importance of mathematical practice, the neural structures underlying mathematics, the way mathematical capacities develop in young children, and precursors to mathematics such as geometrical and numerical cognition in non-human animals. In recent papers, I argue that these findings from cognitive science provide some support for a form of mathematical realism (ante rem structuralism).
- De Cruz, H. (2019). Animal cognition, species invariantism, and mathematical realism. In: A. Aberdein and M. Inglis (Eds.), Advances in experimental philosophy of logic and mathematics(pp. 39–61). London: Bloomsbury Academic.
An argument for why empirical observations about animal numerical cognition support mathematical platonism.
- De Cruz, H. (2018). Testimony and children's acquisition of number concepts.. In: S. Bangu (Ed.), Naturalizing logico-mathematical knowledge: Approaches from philosophy, psychology and cognitive science (pp. 164-178). London: Routledge.
A paper on the role of testimony in the acquisition of number concepts, and how this should change how we think about mathematical cognition and its development.
- De Cruz, H. (2016). Numerical cognition and mathematical realism. Philosophers' Imprint, 16, 1 - 13.
A closer look at the neural structures underlying numerical cognition, and whether we can draw conclusions about the ontology of mathematical objects (this paper, like the 2019 one, argues in favor of mathematical platonism).
- De Cruz, H. & De Smedt, J. (2013). Mathematical symbols as epistemic actions. Synthese, 190, 3 - 19.
A paper examining how mathematical symbols help us think, by offloading some of the cognitive work we would otherwise do in our heads.
- De Cruz, H., Neth, H., & Schlimm, D. (2010). The cognitive basis of arithmetic. In: B. Loewe & T. Mueller (Eds.), PhiMSAMP. Philosophy of mathematics: Sociological aspects and mathematical practice (pp. 59-106). London: College Publications.
Review article on the cognitive origin of arithmetic.
- De Cruz, H. & De Smedt, J. (2010). The innateness hypothesis and mathematical concepts.Topoi. An International Review of Philosophy, 29, 3 - 13.
Explores the philosophical notion of innateness and how this has been used in the developmental psychological literature, with a focus on the acquisition of number concepts.
- De Cruz, H., & Pica, P. (2008). Knowledge of number and knowledge of language: Number as a test case for the role of language in cognition. Philosophical Psychology, 21, 437 - 441.
Introduction to a thematic special issue on the relationship between number concepts and number words.
- De Cruz, H. (2008). An extended mind perspective on natural number representation. Philosophical Psychology, 21, 475 - 490.
Uses the concept of extended mind to argue that the distinctly human ability to use external representations as a complement for internal cognitive operations enables us to represent natural numbers.
- De Cruz, H. (2006). Why are some numerical concepts more successful than others? An evolutionary perspective on the history of number concepts. Evolution and Human Behavior, 27, 306 - 323.
A look at the cultural evolution of mathematical concepts.
The cognitive basis of art and literature
De Cruz, H. & De Smedt, J. (2018). Emotional responses to fiction: An evolutionary approach.. In: R. Joyce (Ed.), The handbook of evolution and philosophy (pp. 387 - 398). New York and Abingdon: Routledge.
De Cruz, H. & De Smedt, J. (2011). A cognitive approach to the earliest art. Journal of Aesthetics and Art Criticism, 69, 379 - 389.
The cognitive basis of science and scientific understanding
The way we understand scientific information, as laypeople and as experts, is subject to cognitive constraints. I examine how this affects scientific creativity, the reception of scientific information by laypeople, and whether we can make some inferences or predictions based on these cognitive constraints about the history of science.
- De Cruz, H. (2020). Believing to Belong: Addressing the Novice-Expert Problem in Polarized Scientific Communication, Social Epistemology, 34 (5): 440 - 452.
Examines why the reception of scientific communication can become politically polarized, and how to address this problem. I argue that people are guided both by epistemic aims (a desire for truth) and aims to belong and put their own beliefs in line with those of the group they belong to.
- De Cruz, H. & De Smedt, J. (2013). The value of epistemic disagreement in scientific practice. The case of Homo floresiensis. Studies in History and Philosophy of Science Part A, 44, 169 - 177.
A case study of epistemic peer disagreement on the taxonomic classification of Homo Floresiensis.
- De Cruz, H. & De Smedt, J. (2012). Evolved cognitive biases and the epistemic status of scientific beliefs. Philosophical Studies, 157, 411 - 429.
We show that the cultural transmission of scientific knowledge can lead toward representations that are more truth-approximating or more efficient at solving science-related problems under a broad range of circumstances
- Blancke, S., De Smedt, J., De Cruz, H., Boudry, M., & Braeckman, J. (2012).The implications of the cognitive sciences for the teaching of science and religion: The case of evolutionary theory. Science & Education, 21, 1167 - 1184.
Examines some practical implications of cognitive science in teaching evolutionary theory.
- De Smedt, J. & De Cruz, H. (2011). Science as structured imagination. Journal of Creative Behavior, 44, 29 - 44.
This paper offers an analysis of scientific creativity based on theoretical models and experimental results of the cognitive sciences. Its core idea is that scientific creativity — like other forms of creativity — is structured and constrained by prior ontological expectations.
- De Cruz, H. & De Smedt, J. (2007). The role of intuitive ontologies in scientific understanding - The case of human evolution. Biology and Philosophy, 22, 351 - 368.
Taking the case of human evolution, we explore relationships between intuitive ontological and scientific understanding. We show that intuitive ontologies not only shape intuitions on human evolution, but also guide the direction and topics of interest in its research programmes.
Helping to improve the philosophy profession
These papers are some efforts to help make the philosophy profession a more just, inclusive, and equitable place, and to counter racist, sexist, and classist prejudice within it.
- Larsen, R. R., De Cruz, H., Kaplan, J., Fuentes, A., Marks, J., Pigliucci, M., Alfano, M., Livingstone Smith, D. & Schroeder, L. (2020). More than provocative, less than scientific: A commentary on the editorial decision to publish Cofnas, Philosophical Psychology, 33 (7), 893--898.
This is a letter to the editor.
- De Cruz, H. (2020). Seeking epistemic friction in the philosophy of religion.. In: M. Panchuk & M. C. Rea. (Eds.)., Voices from the edge: Centering marginalized perspectives in analytic theology (pp. 155-168). Cham: Springer
This paper argues that philosophers of religion ought to be more open to epistemic friction, from underrepresented religious traditions and from members of underrepresented groups, and draws on my earlier work in experimental philosophy of religion to make this case.
- De Cruz, H. (2018). Prestige bias: An obstacle to a just academic philosophy. Ergo, 5, 259 - 287.
I propose that in spite of avowals of egalitarianism and commitments to social justice, academic philosophy exhibits steep prestige hierarchies which perpetuate structural injustices and problems. I respond to the objection that prestige bias would be a useful heuristic to filter out quality. The paper also contains some practical ideas on how to counter prestige bias.