The Consciousness Atlas is an interactive web app that visualizes more
than 450 theories of consciousness. It is based on Robert Lawrence
Kuhn's 2024 paper,
"A Landscape of Consciousness". The Atlas maps theories that address phenomenal consciousness - the
subjective feel of experience, such as the redness of red.
What the Atlas is
The Atlas is a visual reference built on Kuhn's taxonomy. It presents
the full set of theories at once so you can explore the field visually
and open any theory to read its entry, like an encyclopedia with
structured entries. Each theory entry shows a concise identity line,
conceptual ground, suggested mechanism, empirical notes, implications,
and sources.
Why this exists
Consciousness is studied across disciplines - neuroscience,
philosophy, and sometimes spiritual or anomalous-state research.
Kuhn's paper collects and organizes hundreds of theories along a
spectrum from most physical to least physical. The Atlas puts that
organization into a visual form so readers, students, and researchers
can quickly see how different positions relate and where each theory
sits on the spectrum.
How it works
Theories are grouped into ten main categories, arranged by their
stance on the physical-to-nonphysical spectrum. Examples of categories
include Materialism, Non-Reductive Physicalism, Functionalism,
Quantum-based theories, Panpsychism, Monism, Dualism, Idealism,
Anomalous States, and Challenge Theories. The app shows the whole map
at once. Click any theory to read its structured entry, which includes
references to canonical sources and named thinkers.
Who it is for
- Students learning philosophy of mind and cognitive science
-
Researchers and lecturers looking for an at-a-glance comparative
resource
-
Journalists and writers who need a quick reference to the range of
positions
-
Curious readers who want a clear view of what people mean when they
talk about consciousness
What the Atlas does not do
The Atlas does not endorse or rank theories. It is a visualization and
reference based on Kuhn's taxonomy - collect and present, not judge.
It does not attempt to settle the hard problem of consciousness. It is
a tool for exploration and comparison.
A note from Kuhn
Kuhn explicitly states the project's purpose: "collect and categorize,
not assess and adjudicate." The Consciousness Atlas follows that
approach. The data and structure are derived from Kuhn's paper;
feedback and suggested corrections are welcome, but the app is a
visualization layer on top of Kuhn's work.
Kuhn was not involved in the design or content of the Consciousness
Atlas, other than his original paper, 'A Landscape of Consciousness,'
which is the sole source.
FAQ
What is phenomenal consciousness?
Phenomenal consciousness refers to subjective experience - the
qualitative feel of being aware, like the taste of coffee or the
redness of red.
How many theories does the Atlas include?
The Atlas visualizes over 220 individual theories, grouped into ten
broad categories.
Does the Atlas show which theory is true?
No. The Atlas presents theories neutrally. It is a map, not an
argument for any single position.
Is the Atlas academic?
The Atlas is based on an academic source - Robert Kuhn's 2024 paper,
"A Landscape of Consciousness" - and links to canonical sources
where available.
Summary
The Consciousness Atlas is a straightforward visualization tool: it
presents Kuhn's taxonomy as a single, explorable map and lets users
open individual theory entries to read structured, referenced
summaries. It is designed to make this complex field easier to survey
and to serve as a practical reference.
Materialism › Computational
Putnam’s Machine Functionalism
Mental States as Functional Roles, Like Software
Putnam’s early machine functionalism defines mental states by their functional roles, the causal relations among sensory inputs, internal states, and motor outputs, not by what they are made of. Since the same role can be filled by very different physical systems, pain could exist in octopuses, aliens, or computers, which led Putnam to reject mind-brain identity theory. He later rejected strict functionalism as blind to meaning, embodiment, and qualitative experience, and moved to a ‘liberal functionalism’ and pragmatic pluralism.
Hilary Putnam
What consciousness is
A mental state is a functional state of a system, fixed by its causal relations to inputs, outputs, and other internal states. In Putnam’s analogy, the mind is software and the brain is the hardware it runs on.
Mind and body
Mental states are realized by physical states but not identical with any particular kind of them. Putnam always rejected substance dualism, and late in his career he denied that mental phenomena could be fully described by a single fundamental physical theory.
Mechanism
Multiple realizability. The same mental state can be realized in different physical systems as long as their internal states play the same functional role.
Core claims
- The functional organization of a system is the set of causal relations among its sensory inputs, motor outputs, and internal states, and mental states are defined by it.
- Pain linked to C-fiber firing in mammals could be realized in creatures with different biology, so mental states are not identical with specific brain states.
- Putnam later argued that semantic externalism undercuts functionalism, because functional states are internal while mental content depends on the environment.
- In his late work, Putnam held that functionalism is not a complete philosophy of mind and defended a liberal functionalism grounded in embodied, environment-involving capacities.
Criticisms
Putnam became his own main critic. He argued that strict functionalism oversimplifies mental phenomena, ignores the semantic and intentional aspects of thought, and cannot capture qualitative experience.
Implications
- AI consciousness: Possible
- Multiple realizability lets mental states ‘run’ on computers as well as brains. Putnam’s later doubts that functionalism captures qualia and meaning leave machine consciousness open.
- Survival beyond death: Unlikely
- Putnam rejected substance dualism, so mental states need some physical system to realize them, and nothing in the view supports survival without one.
- Meaning and purpose: Humanistic only
- Putnam’s pragmatic pluralism treats mental talk as a human conceptual scheme suited to human purposes, with no appeal to cosmic purpose.
- Virtual immortality: Possible
- On machine functionalism, reproducing a mind’s functional organization in another substrate would reproduce its mental states, though Putnam’s later externalism ties content to the world as well.
Related theories
Sources
- Putnam’s Machine Functionalism (Landscape of Consciousness entry), Hilary Putnam (1988)
Explore all theories on the Consciousness Atlas
