Antonio Damasio is a neurologist known for
his writings and experiments on emotions. His best known previous book is Descartes'
Error, which argued that emotions have an important role in rational
decision-making, and presented evidence that people who suffer damage to the
brain centers that generate emotions become seriously impaired in their
decision-making ability. His most recent book, Looking for Spinoza, concentrates
specifically on the conscious aspect of emotions.
Damasio's main thesis in the book consists of
two basic claims. The first claim is that emotions are connected to states of
the body and are an integral part of the biological process of homeostasis--maintaining
the internal conditions necessary for the continuation of life. Damasio presents empirical data about how
the brain processes emotions, including data from brain imaging about what
happens in the brain when emotions are triggered, experimental data on how
emotions can be triggered by electrically stimulating specific areas of the
brain, and data on how damage to specific areas of the brain can make a person
incapable of certain emotions, or, conversely, cause certain emotions to be triggered
periodically with no apparent cause. The presentation of empirical data is the
most consistently interesting and informative part of the book; and it supports
Damasio's claim by demonstrating that the process of monitoring the body's
internal state by the brain and the process of generating emotions are closely
connected and involve the same brain areas.
Damasio's second main claim is that feelings are about one's own
internal state and only indirectly about the external world--a thesis that is
not supported by any of his empirical data, and, as we'll see, is the result of
unidentified philosophical premises.
A major drawback of the book is that Damasio
writes in a roundabout, sometimes ambiguous style that makes his claims hard to
identify. Many parts of my analysis below really are my best guess as to what
he means, and given his lack of clarity, I recognize it is possible I
misunderstood him.
The lack of clarity is worsened by Damasio's
confusing terminology; he uses the word "emotion" to refer widely to
all action by living organisms aimed at maintaining homeostasis, but excluding
all elements of conscious experience involved in such action; the conscious
experience is termed "feeling", and distinguished from
"emotion". All behaviour (of animals or human beings), as well as
lower-level physiological processes such as metabolic regulation and the
operation of the immune system, are classified as types of emotion. When
referring to actual emotions, e.g. joy, sorrow, or fear, he refers to the related
physiological processes and behaviour (but excluding the conscious experience)
as "emotions-proper", and to the conscious experience as
"feelings." While he explains this idiosyncratic terminology in
detail at the beginning of the book, it does not accomplish anything of value,
and it requires extra effort on the reader's part in continually reminding
himself of this new terminology while struggling to understand what Damasio is
saying.
Damasio is clearly fascinated with Spinoza,
and devotes a large section of the book--70 pages out of a total of 355--to
biographical material about Spinoza. He sees two points in Spinoza's philosophy
as revolutionary for their time and as precursors of his own thesis.
The first is Spinoza's concept of conatus--an
internal drive of every being towards self-preservation--and his view that
emotions are manifestations of conatus. Damasio is correct that
Spinoza's view of emotions as having a teleological role in maintaining one's
life was indeed revolutionary, against the traditional view of emotions
(associated with Plato and with Descartes) as primary, irreducible drives,
unrelated to any biological purpose. Damasio also sees the conatus as a
precursor of the modern understanding in biology of the maintainance of homeostasis
in living organisms. While there is an intriguing parallel here, there is a
crucial point of difference that Damasio ignores: Spinoza regarded the conatus
as operating in all entities in the universe, including inanimate ones; it is
not a biological process, but a metaphysical one. This makes its alleged
parallel to homeostasis superficial only.
Damasio also connects his theory with
Spinoza's view that mind and body are integrated and that emotions are ideas of
bodily modifications. However, Spinoza regards mind and body as parallel
attributes of an underlying substance, attributes that operate in parallel but
cannot causally interact with each other. When Spinoza describes emotions as
ideas of bodily modifications, he does not regard the bodily modification as
either causing the emotion or caused by it; rather, the emotion and the bodily
modification are two parallel aspects, in the mind and in the body,
respectively, of the same event in the underlying substance. Damasio, in
contrast, regards feelings as effects in the mind which are caused by bodily
processes; and which themselves, in turn, have further physical effects in
modifying one's behavior. Thus, Damasio's view is centrally based on causal
interactions between mind and body, which Spinoza's philosophy rules out, and
it is a misunderstanding of Spinoza to see any parallels between them.
Thus the sections of the book that discuss
Spinoza are interesting but off-topic. Damasio’s interest seems to be mostly
the result of taking some bits of Spinoza's philosophy out of context.
As I note above, Damasio's first main thesis
in the book is that feelings are connected to states of the body, part of the
biological system for maintaining homeostasis. He sees emotions (or "emotions-proper,"
as he refers to them) as the top of a hierarchy of control mechanisms directing
the organism's actions towards maintaining the internal conditions for
survival. The simplest of homeostatic mechanisms are metabolic regulation,
basic reflexes, and the operation of the immune system; at a more complex level
there are physical pain and pleasure; at a still more complex level there are
drives such as hunger and thirst; and, at the highest level, there are
"emotions-proper." Each level in the hierarchy is aimed at the same
basic goal: internal evaluation by the organism of the state of its well-being,
helping to direct the organism's actions towards improving its well-being; and
the control machinery of each level is used as a component in producing the
next more complex level.
Damasio notes that the physiological
processes that are part of an emotional reaction are, in evolutionary terms,
prior to feelings, i.e. to the concious element of the emotions, and can be
found even in very simple animals that as far as we know do not have anything
equivalent to feelings. He also notes that the brain centers that process
information about the internal state of the body are also central to generating
feelings; and sensing of one's body state is, in most cases (though with some
significant exceptions), a central part of the process of generating these
feelings. For example, when a person feels fear, the physiological changes of
an accelerating heartbeat, increased adrenalin, etc., will in most cases occur before
the conscious feeling of fear begins; and the process of producing the feeling
of fear will involve sensing by the brain of these internal physiological
changes.
In discussing what can trigger emotions,
Damasio notes that the more complex the animal, the more complex the potential
triggers for emotions. In lower animals, emotions can be triggered only by
directly perceived objects. In human beings, capable of abstract thinking, an
emotion will often be triggered by a thought. Some emotions, e.g. fear, can be
triggered in human beings either by thought or by some directly perceived
object; other emotions - Damasio mentions pride and shame as examples - require
thought for their triggering. When thought is involved in triggering an
emotion, the thought will usually cause the physiological component of the
emotion first, which will in turn cause the feeling.
Damasio's integration of feelings with all
the other biological processes aimed at sustaining the organism's life at the physical
level is consistent with a biocentric philosophy of mind and is supported in
depth by the evidence he discusses. The same can’t be said for his second main
thesis: that feelings are about one's
own internal state and only indirectly about the external world.
From the fact that the brain constantly
receives information about internal states of body, Damasio concludes - with no
further evidence, evidently feeling that it immediately follows - that the
brain maintains a map of the body. And, from the fact that the information
about internal body states is part of the process of generating feelings, he
concludes - again, with no further evidence - that feelings are about the
brain's map of the body, and only indirectly about the external world.
Damasio refers to all sensory states as
"images of the body”. These”images of the body” include sensations that
are directly about the state of the body, such as physical sensations of
pleasure or pain; and they also include perceptions of the external world, which
Damasio refers to as “images from special sensory probes”. Perception of the
external world is, for Damasio, simply a special case of an internal state of
the body mapped in the brain; and all feeling, whatever its apparent object in
the external world, actually has such a map of the body as its object.
Damasio does recognize that in some cases
sensations or feelings can be produced entirely in the brain with no relation
to states of the rest of the body. He notes cases of emotional reactions that
do not involve any measurable event in the body outside of the brain. He also
notes, at the level of physical sensations, examples in which the brain
suppresses the sensations that the state of the body would normally lead to;
e.g. when pain from an injury is not felt while running away from danger. These
seem like clear counter-example to the idea that all feelings are about the
brain's map of the body, but Damasio begs the question by referring to such
feelings as "false maps", "simulated body states".
Damasio is taking for granted that the only
way the brain can perceive or use any information is by constructing an
internal image or map, and our perception is then of this internal map and only
indirectly of the object of the information. Thus, if the process of the
generation of feelings involves information received by the brain about
internal body states, this has to mean that the feelings are perceptions of the
brain's internal map of the body; any relation of a feeling to the external
world can only be indirect, through the brain’s mapping of “images from special
sensory probes”. This is the doctrine of representationalism (discussed and
refuted in detail by David Kelley in The Evidence of the Senses), which
Damasio accepts as an unidentified, unquestioned premise. This makes him unable
to see that feelings, mediated by physiological events and by feedback to the
brain about these physiological events, can have an external entity or event -
one with relevance to one's well-being - as their object.
In explaining the role of feelings, and the
reason why they evolved, Damasio builds on the view associated with William
James: that consciousness is necessary in higher animals in order to deal with
the greater range of information they receive from the environment and the
greater number of possible actions they have to choose from. Damasio sees
feelings as the basic function for which consciousness evolved, bringing
emotions into conscious awareness, and thus making it possible to control the
execution of emotional actions. For example, animals that have the
physiological machinery of emotional reactions but no feelings would
automatically flee when perceiving a predator; higher animals that do have
feelings will feel fear, but may perceive other relevant information that will
affect whether they actually flee or not.
For human beings, with their ability for
abstract thinking and decision-making, feelings also have the role of bringing
emotions into the rational decision-making process. As he did in his previous
book, Descartes' Error, Damasio discusses patients who suffered damage
to regions of the brain necessary for generating certain classes of emotions.
Even though their reasoning abilities and specific skills seemed unaffected,
they became severely impaired in their ability to plan their activities, manage
their finances, reliably keep their obligations, and, in general, make
decisions significantly affecting their lives.
This evidence leads Damasio to conclude that
emotions - and specifically their conscious component, or "feelings"
in his terminology - play a central role in rational decision-making. But when
he tries to specify just what that role is, he generates the most confusing
section of his book. Damasio clearly recognizes that both feelings and
reasoning have roles in decision-making. He recognizes that the role of
feelings in decision-making comes from their nature as signals evaluating what
is for or against the person's life. He further recognizes the crucial role
that memories play in triggering feelings, and, consequently, the fact that
feelings have an important role in bringing lessons from past experience to
bear on decision-making; but he cannot explain just why there would be such a
connection between feelings and memories. Beyond these isolated insights,
Damasio finds it difficult to come up with a coherent theory of what roles
reasoning and emotions respectively play in decision-making, and what the
relation is between them.
On this issue, Objectivism provides some crucial
insights that are needed to complete Damasio's theory and to integrate his
various insights to each other.
The Objectivist theory of emotions is
described by Ayn Rand in "The Objectivist Ethics", in The Virtue
of Selfishness, pp. 27-28; and developed in more detail by Nathaniel
Branden in The Psychology of Self Esteem. The theory consists of two
main ideas:
1. The basic goal of emotions is to help
maintain one's life by identifying and evaluating what is for or against it.
Emotions are thus extensions of the physical pleasure-pain mechanism, serving
the same basic goal at a more complex level.
2. The specific content of emotions is the
result of conscious identifications and evaluations that the person has made in
the past and that have become automatized.
The first of these ideas is shared by
Damasio, and is central to his theory. A major value of Damasio's discussion
for Objectivists is in demonstrating how the Objectivist view of emotions is
supported by the scientific data on the operation of the brain.
The second idea - the connection of emotions
to automatized identifications and evaluations - is an important insight that
Damasio is missing for understanding the relation of emotions to rational decision-making.
It is especially important for making clear the connection of emotions to
memories, and why emotions have a role in applying lessons from past
experience.
(The idea that emotions result from
automatized thinking is also accepted by psychologists of the cognitive
therapy school; see, for example, Aaron Beck, Cognitive Therapy and the
Emotional Disorders. The cognitive therapy theories, however, treat
emotions purely as a source of disorders; they do not provide any positive role
for emotions in rational decision-making. Objectivism's combination of both
these ideas on the nature of emotion is needed to explain the positive role of
emotions.)
As an example, consider one common
characteristic of the brain-damaged patients Damasio has studied: their
inability to perform the jobs in which they were previously successful. After
suffering the brain damage, while their specific job skills were not affected,
they became unreliable in doing the tasks they were responsible for, often
getting distracted after starting a task, neglecting to complete it, and
instead wasting their time on some irrelevant activity that caught their
interest. When questioned after such incidents it became clear that they
intellectually knew what was needed to complete the task, and that their
responsibilities required them to complete it; and yet they did not act on this
knowledge. A responsible worker has automatized his evaluation of the
importance of completing his job tasks reliably and on time; and, when he
becomes familiar with a type of task, he automatizes his identification of the
actions needed to perform and complete the task. These automatic
identifications and evaluations result in emotions that direct him to complete
the tasks he is responsible for; if, while there is an important task to be
done, he gets distracted and starts wasting his time on something irrelevant,
he will quickly experience an uneasy feeling that will lead him to return to
the task. These feelings are what is missing for Damasio's brain-damaged
patients.
So the Objectivist theory of emotions
explains why a responsible worker will have his emotions direct him towards
reliably doing his job. But why are such emotions necessary? Since Damasio's
patients did intellectually know their responsibilities and the requirements of
their tasks, why didn't they act on that knowledge, even without being directed
so by their emotions? The key to understanding this is in another central
original idea in Objectivism: the role of focus.
Objectivism identifies the faculty of focus as the seat of free
will; man's basic choice is the level at which he will focus his mind, and what
he focuses on (see Leonard Peikoff, Objectivism: the Philosophy of Ayn Rand,
pp. 55-69). The most important requirement for good decision-making - even more
important than the ability to reason logically - is focusing on all the
relevant facts and considerations. What someone chooses to focus on is under
his control; but he needs a way to guide this choice. A deliberate, conscious
effort to think of additional factors, to find anything that might have been
missed so far, is important, especially when dealing with new situations, but
it is not enough. Emotions help here by automatically directing man's attention
to those factors that, based on past experience, are likely to be relevant and
that he therefore needs to focus on. This is crucial for making man's control
over his faculty of focus manageable; he can generally allow his focus to be
guided by his emotions, and only exercise the deliberate, conscious effort to
direct his focus when dealing with new and unfamiliar situations, or when some
specific problem makes it necessary. The lack of this automatic guide explains
Damasio's data about the decision-making problems observed in the brain-damaged
patients.
In his previous book, Descartes' Error,
Damasio considers Phineas Gage - the first known case of this type of
brain-damage - and asks: "May he be described as having free will? ... was
he the victim of his new brain design, such that his decisions were imposed
upon him and inevitable? Was he responsible for his acts?" (Descartes'
Error, p. 19) This is an intriguing question, to which Damasio acknowledges
not knowing the answer. Answering it would require understanding the brain
mechanisms involved in choosing the level and direction of focus. This would
make clear the neurological basis of free will, and what kinds of brain damage
make free will inoperative. Such an investigation is needed to complete our
understanding of the causes of the phenomena studied by Damasio, and it would
need to be done by neurologists informed by the Objectivist theory of free
will.
So, considering again the job-performance
problems of Damasio's patients, these patients' problem was specifically in
maintaining focus. While they knew what was needed to complete their tasks,
they did not keep their minds focused on this knowledge, and consequently did
not act on it. We do not know - until the sort of study I suggest above is
performed - to what extent the free will of these patients has been destroyed;
to what extent they have lost the ability to choose the level and direction of
their mental focus. What we do know is that to the extent that these
patients still had control of their mental focus, that control was much harder
for them to exercize, because they lacked the guidance provided by emotions.
This provides the explanation Damasio lacks for the causes of the problem.
The relation of mind and body has always been
a subject of intense interest to philosophers and scientists. Through most of
the history of philosophy, it was almost purely a subject of theoretical
debate; but many saw the modern development of the science of biology as
promising to bring the subject of mind and body into the realm of science,
subject to the scientific method. In recent decades, several writers have
claimed to present a scientific approach to philosophical issues of mind and
body, integrating these issues with modern science. I have previously reviewed
Daniel Dennett's Freedom Evolves, which is an example of that movement
at its worst.
Looking for Spinoza, in contrast, represents the movement at its
best. It is a serious attempt to consider the philosophical issues on the
subject of emotions in a way that is integrated with the scientific data. The
focus on the facts results in some good and informative insights, but a flawed
philosophical context - the unquestioned acceptance of representationalism, and
the lack of the Objectivist insights about the role of focus - results in very
confused interpretation.
In considering the relevance of Objectivism
to the study of emotions, there are two main lessons to be learned from
Damasio's book. The first is that the available scientific, empirical evidence
on emotions and their connection to the brain supports the Objectivist view of
emotions. The second is that Rand's identification of the role of focus is an
insight crucial to understanding the workings of the human mind, specifically
to understanding the role of emotions, and to pointing out important directions
for further investigation.