Patricia Churchland: Neurophilosophy & Mind

Biography

Patricia Smith Churchland was born on July 16, 1943, in Oliver, British Columbia, Canada. She studied philosophy at the University of British Columbia and earned her doctorate at the University of Pittsburgh in 1969. She taught at the University of Manitoba and then moved to the University of California, San Diego, where she has spent most of her career as a professor of philosophy, affiliated with the interdisciplinary cognitive science program. She is married to philosopher Paul Churchland, and the two have been the leading advocates of eliminative materialism and of the program of "neurophilosophy" — the systematic integration of philosophy with neuroscience. She has been president of the American Philosophical Association (Pacific Division) and a fellow of several learned societies, and she was elected to the American Academy of Arts and Sciences in 2019.

Historical Background

Churchland's work grew out of the "naturalistic turn" in the philosophy of mind in the 1970s and 1980s. Under the influence of W.V.O. Quine's naturalism — the view that philosophy is continuous with science — philosophers of mind increasingly argued that the mind should be understood through the empirical study of the brain rather than through a priori reflection. Churchland pushed this program to its radical conclusion in her 1986 book Neurophilosophy, which argued that traditional philosophical questions about the mind cannot be answered in isolation from neuroscience and that the mature science of the brain will reshape the conceptual framework in which we think about mind, self, and consciousness.

At the same time, Churchland became the most prominent defender of eliminative materialism, the view — first advanced by her husband Paul and by Richard Rorty — that our common-sense conception of the mind, sometimes called "folk psychology," is a theory like any other, and that its core concepts (belief, desire, intention) may turn out to be as false to reality as the concepts of phlogiston or demonic possession. If neuroscience eventually explains behavior without using these concepts, then belief and desire may be eliminated from the scientific picture of the mind rather than reduced to it.

Core Ideas

Neurophilosophy

Churchland's central methodological thesis is that philosophy of mind and neuroscience must be pursued together. The mind is the brain, and questions about consciousness, the self, perception, and morality are questions about what the brain does and how it does it. Neurophilosophy is not a discipline separate from neuroscience but a way of doing philosophy that is informed by, and accountable to, the empirical sciences of the brain. Churchland's own work exemplifies this program: she has written on the neural basis of pain, on the representation of time, and on the neuroscience of decision making and social behavior, always drawing on the actual experimental literature.

Eliminative Materialism

Eliminative materialism is the thesis that the concepts of folk psychology constitute a false theory of the mind and may be replaced by the concepts of a mature neuroscience. The argument is analogical: just as chemistry eliminated phlogiston and astronomy eliminated the crystalline spheres, so neuroscience may eliminate belief, desire, and other propositional attitudes. Churchland emphasizes that this is not a prediction but a live hypothesis: whether folk-psychological concepts survive depends on whether the brain sciences find a place for them in their explanations. Critics object that eliminative materialism is self-undermining (if there are no beliefs, then there is no belief in eliminative materialism) and that it flies in the face of the predictive success of everyday psychology. Churchland's response is that the argument from predictive success is weak, since folk psychology's predictions are imprecise and it has made little progress over the centuries.

The Self as a Brain Process

In Touching a Nerve: The Self as Brain (2013), Churchland argues that the self is not a mysterious inner entity but a set of brain processes: the ongoing activity that integrates memory, perception, emotion, and social understanding into a working model of an individual. The self is what the brain does when it manages the organism's interactions with the world. There is no "ghost in the machine" and no central observer: the sense of self is a construction of neural activity, and when the brain is damaged — in dementia, stroke, or injury — the self is altered or dissolves accordingly. This naturalist account of the self connects her work to the broader scientific study of personal identity and to the debates about what is the self.

Morality as Brain Science

In Braintrust: What Neuroscience Tells Us about Morality (2011), Churchland extends her naturalism to ethics. Morality, she argues, is not a set of eternal truths delivered by reason but a natural phenomenon rooted in the neurobiology of caring. The evolution of mammals produced a suite of capacities — attachment to offspring, empathy, the ability to learn social norms — that constitute the biological platform of morality. Morality is the set of learned and innate practices that regulate social life on the basis of this platform. Churchland is not a skeptic about ethics: she argues that moral values are real, but they are real as facts about our nature and social needs, not as facts about a Platonic realm.

Major Works

Neurophilosophy: Toward a Unified Science of the Mind-Brain (1986) is her founding manifesto for the integration of philosophy and neuroscience. The Computational Brain (1992, with Terrence Sejnowski) introduced philosophers to neural network models of cognition. Braintrust: What Neuroscience Tells Us about Morality (2011) developed her naturalist account of ethics. Touching a Nerve: The Self as Brain (2013) presented her account of the self for a general audience. Her papers with Paul Churchland, collected in On the Contrary: Critical Essays, 1987–1997 (1998), include the classic statements and defenses of eliminative materialism.

Philosophical Influence

Churchland has been a defining figure in the naturalization of the philosophy of mind. Neurophilosophy is now an established and thriving field, and few philosophers of mind today would deny that their subject must be in dialogue with the brain sciences. Her defense of eliminative materialism, though still a minority position, has permanently unsettled the assumption that the concepts of folk psychology are safe from scientific revision, and the debate she provoked remains one of the liveliest in the philosophy of mind.

Her naturalist account of the self and of morality has influenced cognitive science, ethics, and the public conversation about brain science. The claim that "the self is the brain" has become a slogan of the neuroscience literature, and her account of morality as rooted in mammalian caring has shaped the growing field of moral neuroscience. Critics, including David Chalmers and John Searle, argue that her naturalism fails to address the subjective character of consciousness, but Churchland's response — that consciousness, like the self, will be understood when we understand the brain — remains the working assumption of most of cognitive neuroscience.

Related Concepts

Churchland's work connects the philosophy of mind to the philosophy of neuroscience and to materialism. Her account of the mind-brain relation bears on the identity theory and on the question of what is consciousness. Her account of the self as a brain process engages what is the self and what is the narrative self, and her naturalism about morality connects to the debate about ethics. Churchland embodies the conviction that philosophy of mind, done properly, is continuous with the science of the brain — and she has done more than anyone to make that conviction a working research program.