--- title: Bernardo Kastrup --- Bernardo Kastrup is the most prominent living defender of **idealism** — the view, once central to Western philosophy and now in revival, that reality is fundamentally mental. Trained twice over, as a computer engineer and as a philosopher, he argues that consciousness is not produced by the brain but is the very ground of existence: that the physical world is what a deeper, universal mind looks like from outside, and that each of us is a dissociated fragment of that one mind. He makes the case not as mysticism but as careful analytic argument, and through the Essentia Foundation and a steady stream of books and debates he has become the intellectual hub of the contemporary idealist turn. ## Two doctorates Kastrup was born in Brazil in 1974 and holds **two PhDs** — one in computer engineering (Eindhoven, 2001) and one in philosophy (Radboud, 2019, for a dissertation titled *Analytic Idealism: A Consciousness-Only Ontology*). He signs himself, pointedly, "PhD, PhD." It is the philosophy doctorate and his peer-reviewed publications that license him academically; his earlier life was in high technology — by his own account a stint as a scientist at CERN, research at Philips, the founding of the chip-design company Silicon Hive (which he says Intel acquired in 2011), and a strategy role at the lithography giant ASML. That industry record is real but largely self-reported, and functions in his story mostly as ethos: a hard-nosed engineer, not a mystic, arriving at idealism by argument. Today he is **Executive Director of the Essentia Foundation**, a Dutch non-profit for consciousness research whose academic advisory board includes Donald Hoffman, Iain McGilchrist, and the psychiatrist Edward Kelly. ## Analytic idealism Kastrup's system holds that consciousness is "nature's sole ontological primitive" — the one kind of thing that exists. There is a single, universal field of consciousness he calls **mind-at-large**; individual minds, including yours, are **dissociated "alters"** of it, in the way a single psyche can split into separate centres in dissociative identity disorder; and matter is simply "what mind looks like from outside." The brain, on this view, does not generate experience — it is the *image* of a dissociative process, the way a whirlpool is the visible shape of a movement in water; "correlation is not production." The full argument, and the empirical evidence he marshals from dissociation research, is set out in . ## In conversation Kastrup is prolific: among his books are *Why Materialism Is Baloney* (2014), the more academic *The Idea of the World* (2019, which gathers several of his peer-reviewed essays), and recent studies decoding the metaphysics of Schopenhauer and Jung. His scholarly case appears in journals including the *Journal of Consciousness Studies* ("The Universe in Consciousness," 2018) and *Disputatio* ("On the Plausibility of Idealism," 2017). His position is a minority one — physicalism remains the default in academic philosophy of mind — but it is seriously and openly argued: he has debated Christof Koch, Philip Goff, Sean Carroll, Sabine Hossenfelder, and . His idealism differs from Hoffman's in a precise way — one universal mind dissociating into many, versus many separate agents combining into networks — yet the two are firm allies against physicalism, and Hoffman sits on Kastrup's advisory board. ## Sources & talks The opening lecture of his *Analytic Idealism* course: A wide-ranging interview on why the scientific worldview is shifting: **More:** a direct dialogue with Donald Hoffman, ["Can You Mathematically Model Dissociation?"](https://www.youtube.com/watch?v=X9MRsGiAaBw). **Primary sources:** his sites [bernardokastrup.com](https://www.bernardokastrup.com/) and [analyticidealism.com](https://analyticidealism.com/), the [Essentia Foundation](https://www.essentiafoundation.org/), his [peer-reviewed papers](https://www.bernardokastrup.com/p/papers.html), and books including *The Idea of the World* (2019).