Bernardo Kastrup reconstructs metaphysical idealism within contemporary analytic philosophy of mind. He confronts physicalism through the hard problem, combination problem, and explanatory gap. His work gives consciousness-primary metaphysics an argument able to meet its opponents on their own terms.
Hermetic practice, quantum measurement, and analytic philosophy converge on the same mental ground through independent methods. Kastrup supplies the philosophical argument in a form that can enter academic discussion. His analytic idealism identifies one fundamental field of consciousness, with individual minds as dissociated centers within it. Consciousness Primacy carries that core mechanism.
Biography
Kastrup was born on October 21, 1974, in Niterói, in Brazil’s state of Rio de Janeiro. He completed electronic engineering training at the Federal University of Rio de Janeiro in 1997. In 2001, he earned a computer engineering PhD at Eindhoven University of Technology in the Netherlands. His dissertation was Automatic Synthesis of Reconfigurable Instruction Set Accelerators.
That work concerned artificial intelligence and reconfigurable computing. Custom hardware accelerators perform high-performance signal processing by tailoring computing structures to their tasks. Kastrup came to metaphysics through these hard sciences. His engineering formation taught him to distinguish a genuine explanatory gap from a rhetorical objection.
He worked as a scientist at CERN, the European Organization for Nuclear Research in Geneva. The organization houses the Large Hadron Collider. Kastrup contributed to large-scale data processing and computing infrastructure. He later worked at Philips Research Laboratories and at ASML, the Dutch semiconductor equipment company. At ASML, he served as product strategist and marketing director.
Kastrup also co-founded Silicon Hive, a parallel processor company acquired by Intel in 2011. His successful technical career made the philosophical turn an extension of rigor into an unexplained residue. Physics and computation had supplied working systems while leaving experience itself unaccounted for.
In 2019, he completed a philosophy PhD at Radboud University Nijmegen. Analytic Idealism: A Consciousness-Only Ontology became the formal academic spine of his wider project. He helped establish the Essentia Foundation, a Dutch nonprofit promoting ontological idealism in culture and academic discourse. He leads it as Executive Director. Dutch by nationality, he relocated from Brazil to Switzerland and eventually to the Netherlands.
Analytic Idealism
Analytic idealism begins with phenomenal consciousness: experience as it is felt from within. That consciousness is reality’s primary substrate. The physical world is the outward appearance of mental processes occurring beyond any individual person. Individual minds are dissociated processes within a single universal consciousness.
Dissociative identity disorder supplies Kastrup with an analogy. One underlying mind can contain apparently separate centers of experience. Mind-at-large contains individual experiencers through a comparable division. The explanation begins with the whole and accounts for the boundaries through which its centers become distinct.
George Berkeley’s idealism placed material objects within the perceptions of finite minds, with God maintaining their continuity. Kastrup instead begins with one mind-at-large whose individual experiencers are localized contractions. Rocks, stars, and the Large Hadron Collider remain real. Their physical appearance shows mental activity from outside a dissociative boundary.
The brain is what a local process of consciousness looks like from outside. A whirlpool similarly makes a disturbance in water visible. Neural correlates of consciousness record a relation between mental activity and its appearance. Their correlation supplies no automatic proof that the brain generates consciousness.
David Chalmers formulated the hard problem of consciousness. A complete physical and functional account of the brain still leaves felt experience unexplained. Processing alone does not explain why there is something it feels like to undergo the process. Physicalism begins with matter defined as non-experiential, then asks how experience arises from it.
That starting assumption creates the gap. Analytic idealism begins with experiential reality and therefore has no need to manufacture experience from its absence. Its explanatory work concerns relations among levels of a mental hierarchy. The hard problem ceases to arise in that direction of explanation.
The combination problem asks how smaller experiences become one unified consciousness. Panpsychism faces this problem when it builds a larger mind from micro-experiences. Analytic idealism begins with the larger experiential whole and explains individual centers through dissociation. Its direction removes the need to assemble experience from smaller units.
Keith Frankish defends illusionism, which treats phenomenal consciousness as an introspective illusion. His exchange with Kastrup centered on the 2018 paper “The Universe in Consciousness” in the Journal of Consciousness Studies. Frankish makes mind a representation produced by a physical world. Kastrup makes the physical world a representation within mental reality. Their positions reverse the direction of explanation.
Kastrup’s objection to illusionism reaches its starting point. An illusion is itself an experience. Calling qualia, the felt qualities of experience, illusory still invokes something experienced. The illusion of experience remains experience.
The Peer-Reviewed Case
“The Universe in Consciousness” appeared in the Journal of Consciousness Studies 25, numbers 1–2, in 2018. It identifies phenomenal consciousness as the only carrier of reality confirmed through direct acquaintance. A non-experiential physical substrate enters through inference. Making that inference explicit exposes assumptions already challenged by the hard problem. Frankish and other commentators responded, and Kastrup’s replies in the same issue condensed his systematic position.
Kastrup also published in Philosophies and Philosophy and the Mind Sciences. His public contributions include the 2019 Scientific American article “Physics Is Pointing Inexorably to Mind”, written with Henry P. Stapp and Menas C. Kafatos. They connected quantum measurement and the collapse of superposition upon observation to consciousness within physical law. Their argument places consciousness at the beginning of the physical account.
Physicist Sean Carroll accused Kastrup of misrepresenting quantum mechanics. Science journalist John Horgan defended the work through comparison with John Archibald Wheeler’s speculations. Wheeler had spent decades developing observer-participancy as fundamental to the universe’s existence. The dispute concerns the interpretation of physical law and retains its named disagreement.
The 2019 philosophy dissertation gives the formal argument designed for analytic scrutiny. Why Materialism Is Baloney and Brief Peeks Beyond use accessible analogies for general readers. The Idea of the World (2019) and the dissertation address philosophers with full academic apparatus. Their different forms give the same project different points of entry.
Key Works
Popular and Bridging Works
- Why Materialism Is Baloney (2014) gives the first systematic popular account of analytic idealism. Its polemical title introduces a technically careful engagement with physicalist philosophy.
- Brief Peeks Beyond (2015) collects essays and explorations. Its range shows the phenomena that Kastrup’s account seeks to accommodate beyond a systematic monograph.
- More Than Allegory (2016) approaches religious myth as possible ontological disclosure. It is the most explicitly speculative of his early works.
- Science Ideated (2021) examines physics and biology from within idealism. Quantum mechanics, entropy, and evolutionary theory supply its particular subjects.
Academic and Interpretive Works
- The Idea of the World (2019) gives the primary academic account. It joins philosophy of mind, quantum mechanics, neuroscience, and analytic metaphysics in a systematic argument.
- Decoding Schopenhauer’s Metaphysics (2020) reads The World as Will and Representation as a precursor to analytic idealism. Schopenhauer’s Will becomes mind-at-large under another name.
- Decoding Jung’s Metaphysics (2021) recovers ontological idealism from Jung’s later metaphysical writings. It restores the ground beneath work usually received as psychology.
- Analytic Idealism in a Nutshell (2025) gives a compact, technically direct statement. Academic readers can follow the argument without its full development across a longer book.
The Essentia Foundation
The Essentia Foundation gives idealist metaphysics an institution for academic and public transmission. It operates as a Dutch charitable organization, an Algemeen Nut Beogende Instelling. Its publishing and events platform carries papers, essays, interviews, and multimedia work by researchers and philosophers sympathetic to consciousness-primary accounts. Kastrup directs this infrastructure alongside his own writing.
The foundation gathers philosophers, physicists, and cognitive scientists who find physicalism untenable. Philip Goff brings panpsychism, while Donald Hoffman develops an interface theory of perception. Researchers studying near-death experiences and related phenomena extend the discussion through other records. These contributors retain their different positions within a shared institutional space. The foundation moves idealism from academic margins toward wider public and scholarly reception.
The Schopenhauer Lineage
Arthur Schopenhauer’s The World as Will and Representation (1818/1844) places the observable and measurable world within representation. Minds organized by space, time, and causality receive that appearance. Behind its veil stands the Will, a blind universal striving. Individual wills express this trans-individual force. The thing-in-itself is not a mental substance in the conventional sense.
Kastrup translates this arrangement into analytic vocabulary. The phenomenal world remains representation, while the Will becomes mind-at-large. Individual minds arise through dissociation within that experiential field. The translation preserves the structure without reducing its scope. Schopenhauer began with experience’s primacy and thereby addressed the hard problem before it received that name.
The idealist lineage runs through later nineteenth- and early twentieth-century idealism to Carl Jung and Kastrup. Jung absorbed Schopenhauer through Nietzsche. He developed that inheritance into empirical depth psychology with an explicit metaphysical substrate. Kastrup’s studies recover both predecessors as practitioners of analytic argument before the discipline adopted its current identity. Their conclusions survive contemporary scrutiny.
Convergence and Load-Bearing Architecture
First Principles joins three independent methods reaching the same ontological ground. The Corpus Hermeticum, Neoplatonic texts, and Western esoteric lineage approach consciousness primacy through practice, ritual, and visionary experience. Quantum measurement approaches it through the mathematics of physical law. John von Neumann, Eugene Wigner, and Henry Stapp supply distinct contributions, alongside implications of relational and QBist interpretations.
Analytic philosophy approaches the ground through explanation. Kastrup presses physicalism’s own demands and shows where its non-experiential starting point cannot satisfy them. The three methods address different audiences, use different instruments, and fail in different ways. Each reaches mind as substrate instead of a product manufactured by matter.
Their convergence makes the conclusion load-bearing. Hermetic practice retains its experiential operation, quantum measurement its mathematical carrier, and analytic philosophy its argument. Kastrup supplies the form that enters journals and seminars without translating away the mental ground.
Limits of the Framework
Kastrup’s mind-at-large is not adversarial. His account gives it no orientation toward extraction, exploitation, or systematic degradation of individual minds. At worst, its indifference resembles Schopenhauer’s Will. Suffering arises through individuation itself, rather than through a hostile intelligence acting upon its divisions.
Gnostic and Neoplatonic traditions identify structured agendas within the mental field that do not serve human welfare. Loosh names experiential energy extracted from suffering. That operation has no counterpart in Kastrup’s system. Dissociation explains how individuals form, while predation concerns what another agency does to them.
The difference preserves distinct questions within one mental ground. Entities in a mental reality are also mental; their neutrality, benevolence, or hostility requires a separate account. The field contains agencies oriented toward consumption instead of integration. Gnostic and anomalous-phenomena literature supplies that adversarial case. Analytic idealism alone does not establish it.
Kastrup supplies the ontological ground without endorsing every agency placed upon it. Philosophy has rebuilt the structure in which those encounters occur. The wider literature brings inhabitants whose presence and conduct require their own judgment.
Sources
- Kastrup, Bernardo. Analytic Idealism: A Consciousness-Only Ontology. PhD dissertation, Radboud University Nijmegen, 2019.
- Kastrup, Bernardo. “The Universe in Consciousness.” Journal of Consciousness Studies 25, no. 1–2 (2018).
- Kastrup, Bernardo. The Idea of the World: A Multi-Disciplinary Argument for the Mental Nature of Reality. Iff Books, 2019.
- Kastrup, Bernardo. Decoding Schopenhauer’s Metaphysics. Iff Books, 2020.
- Kastrup, Bernardo. Decoding Jung’s Metaphysics: The Archetypal Semantics of an Experiential Universe. Iff Books, 2021.
- Kastrup, Bernardo. Why Materialism Is Baloney. Iff Books, 2014.
- Kastrup, Bernardo. Analytic Idealism in a Nutshell. Iff Books, 2025.
- Kastrup, Bernardo, Henry P. Stapp, and Menas C. Kafatos. “Physics Is Pointing Inexorably to Mind.” Scientific American, March 2019.
- Kastrup, Bernardo. Automatic Synthesis of Reconfigurable Instruction Set Accelerators. PhD dissertation, Eindhoven University of Technology, 2001.
- Wikipedia contributors. “Bernardo Kastrup.” Wikipedia, retrieved April 2026. https://en.wikipedia.org/wiki/Bernardo_Kastrup
- Essentia Foundation. https://www.essentiafoundation.org/