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 Analytic Idealism.

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 Donald Hoffman. His idealism differs from Hoffman's Conscious Agent Theory 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:

The Hidden Flaws In Our Common Worldview — Bernardo Kastrup (Essentia Foundation)YouTube

A wide-ranging interview on why the scientific worldview is shifting:

The Scientific Worldview is Quietly Changing — Bernardo KastrupYouTube

More: a direct dialogue with Donald Hoffman, "Can You Mathematically Model Dissociation?". Primary sources: his sites bernardokastrup.com and analyticidealism.com, the Essentia Foundation, his peer-reviewed papers, and books including The Idea of the World (2019).