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Home > English (en) > News > 2011 > THE EVOLUTION OF PREJUDICE
Published on 7 April 2011  by encod

THE EVOLUTION OF PREJUDICE

Source: Scientific American

April 5, 2011

By Daisy Grewal

Scientists see the beginnings of racism in monkeys



All the versions of this article: [English]





Psychologists have long known that many people are prejudiced towards others
based on group affiliations, be they racial, ethnic, religious, or even political.
However, we know far less about why people are prone to prejudice in the first
place. New research, using monkeys, suggests that the roots lie deep in our
evolutionary past.

Yale graduate student Neha Mahajan, along with a team of psychologists, traveled to
Cayo Santiago, an uninhabited island southeast of Puerto Rico also known as
“Monkey Island,” in order to study the behavior of rhesus monkeys. Like humans,
rhesus monkeys live in groups and form strong social bonds. The monkeys also tend
to be wary of those they perceive as potentially threatening.

To figure out whether monkeys distinguish between insiders (i.e. those who belong
to their group) and outsiders (i.e. those who don’t belong), the researchers
measured the amount of time the monkeys stared at the photographed face of an
insider versus outsider monkey. Across several experiments, they found that the
monkeys stared longer at the faces of outsiders. This would suggest that monkeys
were more wary of outsider faces.

However, it is also possible that outsiders simply evoke more curiosity. To rule this
out, the researchers took advantage of the fact that male rhesus monkeys leave their
childhood groups once they reach reproductive age. This allowed the researchers to
pair familiar outsider faces (monkeys that had recently left the group) with less
familiar insider faces (monkeys that had recently joined the group). When presented
with these pairs, the monkeys continued to stare longer at outsider faces, even
though they were more familiar with them. The monkeys were clearly making
distinctions based on group membership.

Mahajan and her team also devised a method for figuring out whether the monkeys
harbor negative feelings towards outsiders. They created a monkey-friendly version
of the Implicit Association Test (IAT). For humans, the IAT is a computer-based task
that measures unconscious biases by determining how quickly we associate different
words (e.g. “good” and “bad”) with specific groups (e.g. faces of either African-
Americans or European-Americans). If a person is quicker to associate “bad” with
African-American faces compared to European-American faces, this suggests that he
or she harbors an implicit bias against African-Americans.

For the rhesus monkeys, the researchers paired the photos of insider andoutsider
monkeys with either good things, such as fruits, or bad things, such as spiders.
When an insider face was paired with fruit, or an outsider face was paired with a
spider, the monkeys quickly lost interest. But when an insider face was paired with a
spider, the monkeys looked longer at the photographs. Presumably, the monkeys
found it confusing when something good was paired with something bad. This
suggests that monkeys not only distinguish between insiders and outsiders, they
associate insiders with good things and outsiders with bad things.

Overall, the results support an evolutionary basis for prejudice. Some researchers
believe prejudice is unique to humans, since it seems to depend on complex thought
processes. For example, past studies have found that people are likely to display
prejudice after being reminded of their mortality, or after receiving a blow to their
self-esteem. Since only humans are capable of contemplating their deaths or their
self-image, these studies reinforce the view that only humans are capable of
prejudice. But the behavior of the rhesus monkeys implies that our basic tendency to
see the world in terms of “us” and “them” has ancient origins.

Psychologist Catherine Cottrell at the University of Florida and her colleague Steven
Neuberg at Arizona State University, argue that human prejudice evolved as a
function of group living. Joining together in groups allowed humans to gain access to
resources necessary for survival including food, water, and shelter. Groups also
offered numerous advantages, such as making it easier to find a mate, care for
children, and receive protection from others. However, group living also made us
more wary of outsiders who could potentially harm the group by spreading disease,
killing or hurting individuals, or stealing precious resources. To protect ourselves, we
developed ways of identifying who belongs to our group and who doesn’t. Over time,
this process of quickly evaluating others might have become so streamlined that it
became unconscious.

Psychologists have long known that many of our prejudices operate automatically,
without us even being aware of them. Most people, even those who care deeply
about equality, show some level of prejudice towards other groups when tested using
the IAT. Despite this overwhelming evidence that our brains are wired for bias, our
society continues to think about prejudice as premeditated behavior. Our current
laws against discrimination, as well as the majority of diversity training programs,
assume that prejudice is overt and intentional. Rarely do we teach people about how
automatic prejudices might taint their behavior towards others.

The fact that prejudice often occurs automatically doesn’t mean we can’t find ways of
overcoming its negative effects. For example, there is evidence that when people are
made aware of their automatic prejudices, they can self-correct. And when we are
encouraged to take the perspective of an outsider, it reduces our automatic prejudice
towards that person’s group.

Given that most of the difficult conflicts we face in the world today originate from
clashes between social groups, it makes sense to devote time to understanding how
to reduce our biases. But our evolutionary past suggests that in order to be effective,
we may need to adopt a new approach. Often we focus more on political, historical,
and cultural factors rather than the underlying patterns of thinking that fuel all
conflicts. By taking into account the extent to which prejudice is deeply rooted in our
brains, we have a better chance of coming up with long-term solutions that work
with, rather than against, our natural tendencies.

ABOUT THE AUTHOR

Daisy Grewal received her PhD in social psychology from Yale University. She is a
researcher at the Stanford School of Medicine, where she investigates how
stereotypes and prejudice affect the careers of women and minority scientists.


Malignant aggression the xenophobic instinct

Psychedelic Library

by Peter Webster

As long as we have examined prehistory in our quest today, why not go back even further to examine evolution itself, to see if it holds any clues to our present predicament with prohibition?

An eternal question for mankind has long been to know the source and reason for what might be called malignant aggression, that human characteristic that has been manifested collectively in the pointless slaughter of war and conquest, genocide and slavery, and individually in participation in horrendous acts of murder, pillage, rape, torture and so forth. Indeed, such violence seems to be the main determinant of the course of history.

It is a question that has occupied many a philosopher, psychologist and scientist, for it would appear that something special has gone wrong with evolution such that it would produce a species capable of wantonly killing its own kind, and apparently quite willing to eradicate itself and all life on the planet as well. Collectively, mankind seems especially insane, and it would seem that nothing in the study of evolution could demonstrate how such a situation could have occurred. In the past, such deliberation has probably led to much pernicious religious dogma such as the doctrine of original sin and the necessity of redemption, confessional practices and the belief in the irresistibility of sin and the superhuman power of evil, and the literal belief in the devil as an actor on the world stage.

It turns out, however, if a theory I’ve been working on is correct, that the seeds of human malignant violence grew from a necessary and beneficial characteristic in our immediate ancestors, the great apes, and it is only when this tendency became subject to the human abilities of language and symbolic behaviour that it then became unmanageable, uncontrollable for many, and the catalyst behind mankind’s collective insanity.

The psychiatrist and author Erich Fromm, in his 1973 treatise, The Anatomy of Human Destructiveness, took up what is still an excellent analysis of the problem. His first task was to debunk a theory that had been proposed in the 1960s by the Nobel-prize winning ethologist Konrad Lorenz. His book, On Aggression, had become a best-seller, and its main thesis was that mankind’s collective behaviour as manifested in violence and destructiveness of every sort is due to a genetically programmed, powerful and innate disposition for aggression that forever lies in wait for the opportunity to express itself. In other words, mankind’s problem with violence was based on an instinct for violence that we were essentially powerless to counteract.

In his critique, Fromm relentlessly makes the case for the dismissal of the “instinctivist” theories on aggression. To begin his analysis, Fromm first stresses the important distinction between benign, biologically adaptive aggression, such as is aroused for the defence of life or territory, or for obtaining food, compared with what he calls malignant aggression, whose definition should be obvious. According to Fromm, it is a distinction which Lorenz and the instinctivists failed completely to make, seriously undermining their theories on that count alone.

Fromm then shows in a broad survey of animal and human behaviour that the evidence is solidly against blaming inherited instincts for violence and malignant aggression as the main determinant of the course of history. Fromm also makes the following important observation of why a theory such as Lorenz’ gained so much popular attention.

To sum up his views on that point:

The turmoil and increasingly violent nature of the period when the theory captured the public mind, during which we witnessed the assassinations of the Kennedys, Martin Luther King and Malcolm X, the Cuban missile crisis and the increasing threat of nuclear holocaust, through to the darkest days of the Vietnam genocide: such events produced in people a widely perceived feeling of powerlessness to change things, certainly contributing to the popularity of Lorenz’s neoinstinctivism. It was a case of public susceptibility rather than any scientific rigour of the theory - it was rejected by most psychologists and neuroscientists, according to Fromm. Its great appeal to the public also stemmed from the fact that it was a “magic bullet” kind of theory, pretending to explain away a complex phenomenon with an easy-to-understand, all-encompassing and irremediable cause. It was the always-popular kind of explanation that more or less relieved the reader from feeling any responsibility for the situation - how could one hope to go against a psychologically inbuilt inevitability?

Although Fromm certainly succeeds in discrediting Lorenz’ “instinct for violence” theory, I believe, nevertheless, that it is indeed an instinct at the root of the problem. It is an instinct that has come into existence through long evolutionary pathways, one that has been critical and necessary for the evolution of the most advanced hominid species. Its effects may therefore be surmised to be important, universal among members of our species as well as other advanced hominid and ape species, yet with the negative blowback for humans that it is indeed at the root of our problem with irrational violence and malignant aggression. It is not, however, an instinct for violence, nor aggression whether defensive or malignant, but an instinct which can be satisfied through a variety of behaviours, and whose net effect was a key factor in allowing the evolution of complex societies, large brains, and, surprisingly, true altruistic behaviour.

My theory would take far more time to justify with evidence than I have available today, so once again I must ask your indulgence when I insist that my brief outline to follow has been well researched and thought out, and would be far more convincing were you to see the complete body of evidence I have collected. I hope soon to finish a paper on the subject, but for now let me just describe the basic features of the idea so that I can connect it with the problem of prohibition. In fact, I already published an introduction to these ideas in the International Journal of Drug Policy in 1999. The paper was titled, “Drug Prohibition: A Perverted Instinct?” From that title you will already get a hint of the connection between my theory and the problem we are concerned with here today.

The concept of instinct needs some rehabilitation, however. Whether due to some still-lingering absurdities from the long reign of Behaviourist psychology, or the general tendency of scientists today to disbelieve in an entity unless having on hand several specimens in formaldehyde, it seems that mainstream science today is loathe even to use the word, substituting “innate behaviour” or some other euphemism when they need to explain certain behaviours. However, in promoting a rehabilitation of the term and concept of instinct I am not proposing we go back to accepting the ideas that proliferated early in the 20th century, with the long lists of sometimes very dubious things that were supposed to be instincts. For me, it seems that the concept of instinct was in its beginnings scientifically useful, and still is, but that it became corrupted by too wide and too wild an interpretation, especially by the public, leading to its discredit. This is no reason to throw out the baby with the bath-water, however. Many terms have general use meanings completely at odds with their scientific use. And not all scientists have joined in the condemnation, far from it.

Here is what a top authority on cognitive neuroscience has to say: Jaak Panksepp has stated in his book Affective Neuroscience that,
It is becoming increasingly clear that humans have as many instinctual operating systems in their brains as other mammals. However, in mature humans such instinctual processes may be difficult to observe because they are no longer expressed directly in adult behavior but instead are filtered and modified by higher cognitive activity. Thus, in adult humans, many instincts manifest themselves only as subtle psychological tendencies, such as subjective feeling states, which provide internal guidance to behavior.”

I think we can accept the validity of such a view in spite of widespread professional objections, even if we do not know exactly how an instinct is implemented in the brain, or perhaps in some as-yet unproved manifestation such as a species collective memory, or whether we yet understand how an instinct is transmitted from generation to generation. For neuroscientists, everything is in the hard wiring. For evolutionary biologists, everything is in the genes. I’d recommend that they should go looking for the gene or the hard-wiring that makes them believe such reductionist nonsense!

Given the importance of instinct for behaviour throughout the entire animal kingdom, and the obvious way that instinct itself has been subject to evolutionary principles, it would be curious indeed if suddenly a species arose, ourselves, whose behaviour was simply beyond the influence of instinct. With that observation, I’ll leave my brief justification of instinct as a real and effective determinant of behaviour not only for animals but for humans as well, and go on to the meat of my theory.

So what is this instinct I propose that results in malignant violence and aggression? Agreeing with Fromm, the instinct itself has nothing to do with violence per se, but is one that arose and developed as advanced mammals - especially the monkeys and apes - began living in larger and larger, and more complex social groups. It is now believed that the advancing complexity of social groups and the demands that this entailed on individuals, was the primary evolutionary engine for the rapid increase in brain size we see in monkeys and apes through to the hominids and our own species. This increase in brain size, so rapid as to be declared by evolutionary biology as unprecedented, was obviously the most important development leading to the appearance of our species.

In order to live in complex, stable, exclusionary and coherent social groups, members of a group would necessarily have to know who was in the group, and who was not. To make a long story short concerning my findings, knowing who is in the “in-group” involves many complex aspects of individual and group interactions and thus could not be subject to a simple instinctive drive to enable it. Managing all the complexities of interactions in large social groups was and is the domain of our powerful and large brains, not something that could possibly be controlled by a simple instinct. However, knowing whether a given individual is in the “out-group” is a straightforward matter: it could easily be mediated by instinctive behaviour that led individuals and the group to define as the necessary characteristic any simple, easily-transmitted perception or quickly-invoked attitude about unfamiliar individuals. Once that determination has been made, it persists like a knee-jerk reflex.

And so, evolutionary pressures ensured that as ape societies became more complex, an instinct for xenophobia would develop, that is, an instinct mediating a simple, group-wide ability to instantly know an outsider, exclude him and thus preserve group coherence and stability. I call this, quite simply, the xenophobic instinct. It further turns out that recent research has shown that such group coherence, necessary so that group selection might occur, was the key evolutionary development that allowed the appearance of true altruistic behaviour. I’ll have to leave that tantalising idea with just a brief mention, and continue with my central theme, but you can follow this and other ideas from the list of references supplied with the printed version of my lecture. [see article at http://www.psychedelic-library.org/newmenu.htm ]

As for evidence of xenophobia and its instinctive nature in humans I wish to cite just two or three authorities on the matter.
In a paper by Alain Schmitt and Karl Grammer we read, “Indeed, xenophobia and ethnocentrism are universals and a primate legacy.”

The noted ethologist Eibl-Eibesfeldt writes, “Xenophobia is a universal quality...an important component of the human behavioural repertoire. Infantile xenophobia was...observed in all cultures we studied. [Even children] born both blind and deaf display fear of strangers.”
Xenophobia in children and infants, observed in every culture, a primate legacy. And if exhibited by infants, no chance of cultural transmission by learning. Now if that is not an instinct, I should like to know why.

Let me briefly say some further things about instincts before I tie the matter to our present concerns.

Instincts are in some ways like prejudices. It can be very difficult if not impossible to identify them as causative agents in one’s own behaviour. It’s not surprising that we, especially the scientists among us, believe that our rationality reigns supreme, free from inherited, unconscious determinants. That is, quite simply, the way it feels to be conscious.

Instinct and prejudice are also similar in that their sources lie in historical and psychological happenings mostly inaccessible to current awareness: from early childhood experiences and learning in the case of prejudice, and from hard-wiring or even collective species’ memory in the case of instincts. We see, of course, the major difference between instinct and prejudice: whilst the latter is something learned, instinct is inherent and inherited.

Consider then the never-ending phenomenon of racism, a very obvious example of a tragically common behaviour enabled and aggravated by the xenophobic instinct. We believe that racism has its roots in prejudice, and true, some aspects of racism are learned in childhood - they are culturally transmitted. But the cultural transmission of racist attitudes would not be nearly so effective, and a permanent feature of human societies, if it were not enabled by the pre-existing xenophobic instinct in the first place. It is the instinct which makes it so easy to impart life-long racist attitudes to young children, although the particulars of who is to be subject to that racism is culturally determined.

It can be exceedingly tricky to demonstrate in a given individual whether he does indeed harbour racist convictions. But in his society as a whole, for example in the south of the U.S., the prevalence of black/white only facilities, lynchings, organisations such as the KKK, or recently, even widespread voter suppression and so forth, demonstrates that racist prejudice must be widespread and have an indelible effect on the collective behaviour of that society. This observation then lends a proof of the universal prevalence of the xenophobic instinct.

Instinct in humans, as is made clear in the Panksepp quotation I read to you, does not cause an on-or-off, all-or-nothing effect. The actual net effect of a given instinct might well be “subtle” and even vanishingly small, “filtered and modified by higher cognitive activity”, for an individual. But an instinct exerting a slight but significant tendency collectively in a large social group, should result in a powerful force. We humans, on issues and preferences that are “6 of one, a half-dozen of the other,” tend to split reliably very close to 50/50 in our decisions (for instance consider how close honest elections tend to be, always very close to 50/50. And thanks to Diebold touchscreen voting machines, even the dishonest ones don’t go far from an even split!). Therefore, such an incremental or even differential effect of an instinct, when applied to entire populations, may well translate into an important motivator for behaviour exhibited collectively. And this effect should be magnified due to another human propensity: when a style or perception gets rolling in one direction (whether due to the subtle influence of an instinct or otherwise), a great many seem to pile onto the bandwagon just for the ride.

One further point, and this might at once provide an operational definition as well as a diagnostic characteristic for instinct: Satisfying an instinct makes the individual feel good, rewarded, successful, like he has accomplished something, but without any rational or logical perception of why or how that has happened.

With those observations to clarify the nature of my proposed xenophobic instinct, and instincts in general, let me take the final step which you should all now suspect. What allows authorities and governments to get peaceful citizens to fight wars, commit genocide, torture, and crimes against humanity yet believe they are justified in doing so, even though they may suffer Post Traumatic Stress Disorder and even complete emotional breakdown for having participated in acts they know full well to be atrocities? What allows even democratic regimes to incite radical nationalism - the flag-waving, troop-supporting blind adherence to an undertaking that can easily be seen to be a war of aggression? What enables prohibitionist governments to fight the so-called Drug War, whether honestly or for ulterior motives, and have the great majority of citizens support the effort?

It is, above all, the appeal to the citizenry’s great weakness, that when an enemy has been defined, when an evil other, an out-group identified, when a group, a class, a race, a country or even a substance has been labelled as a threat, even for the most preposterous and mendacious reasons, it is the xenophobic instinct in every person which can be easily and reliably activated so that a great number of those persons can then be led off on the most absurd and destructive of crusades, to commit crimes and atrocities of every sort.

America’s designated foes - and I single out America here not because it is alone in perpetrating these evils but because, just maybe, if there is one nation today that has the power to reverse this march toward destruction and global mayhem, it is the USA - America’s designated foes have been communists, gooks in Vietnam, rag-heads in Iraq, terrorists who hate our freedoms, Islamofascists, immigrants, and of course dope-smoking hippies, degenerate drug addicts and drug dealers who profit on the misery of others, and quite astonishingly most people go along with it. Try to get a great number of people to do something or believe something that is not enabled by the arousal of an instinct and you get apathy, indecision, endless bickering, and little action. But when an instinct can be aroused and used, perhaps 80% of the population will follow along, no questions asked.

Hard to believe that 80% figure?

Psychiatrists Erich Fromm and Michael Maccoby conducted personality surveys in the early 1970s that indicated that a significant minority of about 10 percent of persons in all societies were theoretically capable of becoming Hitlers or Himmlers, given the necessary historical and social circumstances. Fromm classed the Hitler type as necrophilous, or death-loving, while Himmler was of a sado-masochistic personality type, more interested to exert absolute control over people than kill them.

Another, similarly-sized minority, were observed to have dominant personality characteristics that classed them as biophiles, those life-loving persons like Albert Schweitzer and Albert Einstein, incapable of being persuaded into supporting great collective crimes. The 70-80% of citizens in the middle, between the two extremes, apparently just blow with the wind, and follow whomever is shouting the loudest. It is of course the Hitlers, Himmlers, and other fascists of this world who know well the method to arouse the people by manufacturing a threat to the homeland, by defining an enemy, the evil outsiders who threaten our liberty, hate our freedoms, and they do shout very loudly about it. To some less-aware fascist types it just comes naturally, but it is obvious that the most crafty among them consciously know how to apply the method, how to make the people feel insecure and threatened by some class or group of outsiders, even it they don’t suspect it is thanks to the xenophobic instinct that the method works so well.

The biophiles, for better or worse, tend never to shout, nor even take a role in government. We find that the biophilic personality typically experiences an all-encompassing unity of life, the kind of experience that mystics seek after, and which some have experienced through the judicious use of psychedelics. The experience of unity, of oneness of all life, may, in fact, be the only effective antidote to the xenophobic instinct, for such an experience simply does not allow fascist rabble-rousers to define a class of outsiders, or separate people into a us-them dichotomy. If all of us are one, who is the outsider?

Well, in telling you all this, I hope I have not lowered your own optimism to the level of mine! However, for any task it is of great importance to know what to expect of one’s attempts to bring about change. Realistic expectations are a great advantage for difficult tasks.

The ideas I have expressed here were directed toward that end to know the less-than-obvious history, psychology and reality of prohibition and its bitter fruits. I can only hope that such an understanding will assist you in whatever your tasks may be.





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The European Coalition for Just and Effective Drug Policies, is a pan-European network of currently 150 NGO’s and individual experts involved in the drug issue on a daily base. We are the European section of an International Coalition, which consists of more than 400 NGOs from around the world that have adhered to a Manifesto for Just and Effective Drug Policies (established in 1998). Among our members are organisations of cannabis and other drug users, of health workers, researchers, grassroot activists as well as companies.


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