Bernardo Kastrup.

Biography

Kastrup was born on October 21, 1974, in Niterói, in the state of Rio de Janeiro, Brazil. He completed his undergraduate training in electronic engineering at the Federal University of Rio de Janeiro in 1997. In 2001, he earned a PhD in computer engineering from Eindhoven University of Technology in the Netherlands, with a dissertation titled Automatic Synthesis of Reconfigurable Instruction Set Accelerators — technical work in artificial intelligence and reconfigurable computing, the design of custom hardware accelerators for high-performance signal processing. The engineering trajectory matters: Kastrup is not a philosopher who encountered consciousness through the humanities. He arrived at metaphysics from the inside of the hard sciences, and his later work bears the marks of someone trained to distinguish genuine explanatory gaps from rhetorical ones.

His professional career ran through some of the most technically demanding environments in the world. He worked as a scientist at CERN — the European Organization for Nuclear Research in Geneva, home of the Large Hadron Collider — where he contributed to large-scale data processing and computing infrastructure. He subsequently held positions at Philips Research Laboratories and as product strategist and marketing director at ASML, the Dutch semiconductor equipment company. He co-founded Silicon Hive, a parallel processor company acquired by Intel in 2011. By any conventional measure, he was a successful engineer and technologist. The philosophical turn was not retreat from rigor; it was its extension into territory where the rigor of physics and computation had left a residue it could not account for.

In 2019, he completed a second PhD — this one in philosophy, from Radboud University Nijmegen, with a dissertation titled Analytic Idealism: A Consciousness-Only Ontology. The dissertation is the formal academic spine of his broader project. He is currently Executive Director of the Essentia Foundation, a Dutch nonprofit he helped establish to promote ontological idealism in mainstream culture and academic discourse. He is Dutch by nationality, having relocated from Brazil to Switzerland and eventually to the Netherlands.

Analytic Idealism

The position Kastrup defends is analytic idealism: the claim that phenomenal consciousness is the primary substrate of reality, that what we call the physical world is the extrinsic appearance of mental processes occurring at a transpersonal scale, and that individual minds are best understood as dissociated sub-processes of a single universal consciousness — much as dissociative identity disorder produces apparently distinct centers of experience within a single underlying mind.

This is not the idealism of George Berkeley, for whom material objects exist only as perceptions in individual finite minds (with God underwriting their continuity). Kastrup’s version posits a single mind-at-large of which all individual experiencers are localized contractions. The physical world — rocks, stars, the Large Hadron Collider — is real, but it is real as the appearance, from outside a dissociative boundary, of mental activity transpiring within mind-at-large. The brain is not the generator of consciousness; it is what consciousness looks like from the outside, the way a whirlpool is what a disturbance in water looks like from outside the water. This move — reinterpreting neural correlates of consciousness as correlates rather than causes — is central to his critique of physicalism.

The argument against physicalism proceeds from the hard problem of consciousness as formulated by David Chalmers: even a complete functional and physical description of the brain leaves unexplained why there is subjective experience at all — why processing is accompanied by the felt quality of being something. Kastrup’s contribution is to press harder on this gap than most. He argues that the hard problem is not a puzzle physicalism has yet to solve but an artifact of physicalism’s own metaphysical assumptions. Physicalism begins by positing an objective, non-experiential substrate — matter — and then faces the apparently intractable task of explaining how experience arises from something defined by its absence of experience. Analytic idealism dissolves this problem at the source: if reality is fundamentally experiential, there is no explanatory gap between mind and world, only between levels of a single mental hierarchy. The hard problem becomes easy, or rather ceases to arise.

Kastrup is equally serious about what is called the combination problem — the challenge for any idealist account of explaining how individual subjective experiences combine into a single unified consciousness. His answer is that the combination problem faces panpsychism (which tries to aggregate micro-experiences into macro-experience) but does not face analytic idealism, which runs the inference in the opposite direction. Individual minds are not combinations of smaller experiential units; they are dissociations of a larger experiential whole. The explanatory direction is top-down, not bottom-up, which eliminates rather than merely relocates the problem.

His debate with Keith Frankish — the British philosopher and primary defender of illusionism, the view that phenomenal consciousness is a kind of introspective illusion and that the hard problem therefore does not genuinely arise — crystallizes the confrontation between analytic idealism and the most sophisticated contemporary defense of physicalism. The exchange, organized around Kastrup’s 2018 paper “The Universe in Consciousness” in the Journal of Consciousness Studies, demonstrates that the two positions are mirror images: Frankish contends the mind is a representation produced by a fundamentally physical world; Kastrup contends the physical world is a representation produced by a fundamentally mental reality. Kastrup’s counter to illusionism is direct: an illusion is itself an experience. To claim that qualia are illusory is to invoke the very thing being denied. The illusion of experience is still experience.

The Peer-Reviewed Case

Kastrup has been unusually deliberate about building an academic paper trail alongside his popular books. The 2018 Journal of Consciousness Studies paper “The Universe in Consciousness” (Vol. 25, No. 1–2) is the clearest single-paper statement of the full argument: that phenomenal consciousness is the only carrier of reality we can confirm through direct acquaintance, that the case for physicalism rests on an inference rather than direct observation, and that once the inference is made explicit it relies on assumptions that the hard problem already undermines. The paper attracted peer commentary from Frankish and others, and Kastrup’s responses in the same issue constitute a compressed version of his systematic position.

He has also published in Philosophies, Philosophy and the Mind Sciences, and contributed to Scientific American, where his 2019 article “Physics Is Pointing Inexorably to Mind” — co-authored with Henry P. Stapp and Menas C. Kafatos — argued that the measurement problem in quantum mechanics, the collapse of superposition upon observation, independently suggests that consciousness is not a late arrival in a physical universe but is implicated in the structure of physical law from the beginning. The Scientific American piece provoked a response from physicist Sean Carroll, who accused Kastrup of misrepresenting quantum mechanics. Science journalist John Horgan defended Kastrup’s work, comparing it favorably to the speculations of physicist John Archibald Wheeler, who spent decades arguing that observer-participancy was fundamental to the universe’s existence.

His philosophy PhD dissertation, Analytic Idealism: A Consciousness-Only Ontology (Radboud University, 2019), is the most formally rigorous statement of his position, designed to withstand academic scrutiny in the analytic tradition. The distinction between the dissertation and the popular books matters: books like Why Materialism Is Baloney and Brief Peeks Beyond are written for general readers and use accessible analogies; The Idea of the World (2019) and the dissertation are addressed to philosophers and carry full academic apparatus.

Key Works

Popular and Bridging Works

• Why Materialism Is Baloney (2014) — the first systematic popular statement of analytic idealism; the title is polemical but the argument is technically careful, engaging physicalist philosophy of mind on its own terms.
• Brief Peeks Beyond (2015) — essays and explorations, less systematic than the monographs, valuable for understanding the range of phenomena Kastrup’s framework is meant to accommodate.
• More Than Allegory (2016) — takes religious myth seriously as potential ontological disclosure rather than mere metaphor; the most explicitly speculative of the early works.
• Science Ideated (2021) — examines how key findings in physics and biology look from within an idealist framework; explicitly engages quantum mechanics, entropy, and evolutionary theory.

Academic and Interpretive Works

• The Idea of the World (2019) — the primary academic monograph, organized as a multi-disciplinary argument drawing on philosophy of mind, quantum mechanics, neuroscience, and analytic metaphysics. The closest thing to a complete systematic treatise.
• Decoding Schopenhauer’s Metaphysics (2020) — a close reading of The World as Will and Representation that argues Schopenhauer’s system is a nineteenth-century precursor to analytic idealism, and that the Will is the mind-at-large under a different name.
• Decoding Jung’s Metaphysics (2021) — performs for Jung’s later metaphysical writings what the Schopenhauer book does for Schopenhauer: recovering a rigorous ontological idealism from a body of work that is usually read as psychology rather than metaphysics.
• Analytic Idealism in a Nutshell (2025) — the most compact and technically direct statement of the position, written explicitly for academic audiences who want the argument without the book-length development.

The Essentia Foundation

The Essentia Foundation, which Kastrup leads as Executive Director, functions as the institutional infrastructure for disseminating idealist metaphysics in both academic and public-facing modes. It operates as a Dutch charitable organization (Algemeen Nut Beogende Instelling) and maintains a publishing and events platform that curates academic papers, essays, interviews, and multimedia content from researchers and philosophers working within or sympathetic to consciousness-primary frameworks. The foundation’s significance extends beyond Kastrup personally: it has become a gathering point for philosophers, physicists, and cognitive scientists who find physicalism philosophically untenable — a short list that includes Philip Goff (panpsychism), Donald Hoffman (interface theory of perception), and researchers working on near-death experiences and related phenomena. The foundation represents the institutional attempt to move idealism from the margins of academic respectability toward the center.

The Schopenhauer Lineage

Kastrup explicitly positions himself as recovering Arthur Schopenhauer’s metaphysics for contemporary philosophy. The World as Will and Representation (1818/1844) argued that the entire phenomenal world — everything we can observe or measure — is representation, the world as it appears to minds organized by space, time, and causality. Behind the veil of representation lies the Will: a blind, universal striving that is the thing-in-itself, not a mental substance in any conventional sense but a trans-individual force of which individual wills are expressions. Kastrup translates this structure into analytic vocabulary: the phenomenal world remains representation; the Will becomes mind-at-large — the single experiential field whose dissociations produce individual minds. The translation is not reductive. Kastrup argues that Schopenhauer already solved the hard problem, long before the problem was named, by beginning with the primacy of experience rather than trying to derive it from matter.

The lineage the wiki’s Traditions framework can accommodate runs: Schopenhauer → late-nineteenth-century and early-twentieth-century idealist philosophy → Carl Jung (who absorbed Schopenhauer through Nietzsche and developed it into an empirical depth psychology with an explicit metaphysical substrate) → Kastrup. The Kastrup books on Schopenhauer and Jung are not historical exercises; they are arguments that these figures were doing analytic philosophy before analytic philosophy had its current methodological self-image, and that their conclusions hold under contemporary scrutiny.

Convergence and Load-Bearing Architecture

The First Principles framework rests on the convergence of three independent methodological traditions on the same ontological conclusion. The Hermetic tradition — as encoded in the Corpus Hermeticum, the Neoplatonic texts, and the Western esoteric lineage — reaches consciousness-primacy through first-person practice, ritual, and visionary experience. The quantum measurement literature — particularly the work of John von Neumann, Eugene Wigner, Henry Stapp, and more recently the implications of relational and QBist interpretations — reaches it through the mathematics of physical law. Kastrup reaches it through analytic philosophy of mind, by pressing rigorously on what physicalism actually requires and demonstrating that it cannot satisfy its own explanatory demands.

The convergence is what makes the conclusion load-bearing rather than merely interesting. Each of these three traditions operates with entirely different tools, speaks to entirely different audiences, and has entirely different failure modes. The fact that they arrive at the same destination — that mind is not produced by matter but is the substrate within which matter appears — is the strongest available argument that the conclusion is tracking something real. Kastrup is the leg of that stool that can be presented in academic journals and cited in philosophy seminars without embarrassment, which matters for the wiki’s broader project of treating these questions as serious rather than fringe.

Limits of the Framework

Kastrup’s analytic idealism is a benign metaphysics. Mind-at-large, in his account, is not adversarial. It is not oriented toward extraction, exploitation, or the systematic degradation of the sub-processes that constitute individual minds. The universal consciousness that Kastrup posits is, at worst, indifferent in the way Schopenhauer’s Will is indifferent — suffering arises from the nature of individuation itself, not from the hostility of a supervening intelligence.

This is the point at which the wiki’s framework diverges from its philosophical anchor. The Gnostic and Neoplatonic traditions the wiki also inherits — the archon literature, the Demiurgic hypothesis, the parasitic-ecology model — posit not merely that reality is mental but that there are structured agendas within that mental field that do not have the welfare of individual human experiencers as their aim. The concept of loosh — experiential energy extracted from suffering — has no counterpart in Kastrup’s system. His dissociation metaphor explains individuation but does not account for predation.

This is a genuine divergence, not a flaw in either framework. Kastrup has established the metaphysical ground: if reality is fundamentally mental, then entities within it are, in the relevant sense, also mental. Whether those entities are neutral, benevolent, or adversarial is a separate question that Kastrup’s framework leaves open. The wiki’s working hypothesis — that the field is not neutral and that some of what operates within it is oriented toward consumption rather than integration — goes beyond what analytic idealism alone can support. It requires the Gnostic and anomalous-phenomena literature to carry the weight. Kastrup provides the ontological license; the adversarial reading requires additional evidence from other traditions and from the phenomenology of the experiences themselves.

The distinction is important to maintain precisely because it marks the edge of what philosophy can do unassisted. Kastrup has rebuilt the house of idealism with structural steel. What the wiki is doing in its more speculative sections is furnishing it — and some of the furnishings come from places Kastrup would not necessarily endorse.

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/