A new book* is out about the famous Minnesota study of twins which demonstrated the overwhelmingly significant influence of our genes on our respective fates. When one is confronted with identical twins who have been raised apart and who are not only physically but also psychologically and intellectually very similar, the obfuscatory and equivocal talk which has for so long surrounded these matters is exposed for what it is.
Yes, there are complexities. There is the possibility that some people may attribute a more significant role to our genes than they in fact play. But I think by far the more common error is to underestimate the power and significance of genetic factors.
My views on this matter started to take shape when I saw a documentary film based on the Minnesota study and featuring some of the twins themselves. One thing was strikingly clear: what the social scientific establishment had been saying for so long about genetic inheritance (essentially downplaying its importance) was false (and presumably ideologically motivated).
Attempts to discredit studies such as the Minnesota project continue. People will believe what they want to believe, I guess, and try to convince others.
But, just as the ideologically-inspired bias of famous phonies like Margaret Mead was eventually exposed, so later waves of social pseudo-scientists and ideologically-driven philosophers will fall by the wayside.
Truth wins in the sense that ideas which are way out of line with the data are marginalized (and eventually fizzle out). Debate and conflict may continue, but the battle lines have shifted and will continue to shift.
* Here are some pertinent comments by Matt Ridley; and here is Bryan Caplan's review from The Wall Street Journal.
Showing posts with label genetic influences. Show all posts
Showing posts with label genetic influences. Show all posts
Thursday, June 28, 2012
Tuesday, February 21, 2012
Muddying the waters
Nick Miller interviewed a pink-haired Jesse Prinz in a Manhattan cafe about a new book which the City University of New York philosopher has written challenging the supposed orthodoxy of genetic determinism. But the current consensus on the old nature versus nurture question is not genetic determinism: it is a view which recognizes the complex interactions between human genes and the environment. Prinz is also arguing against the idea that our brains are, as it were, primed for language. And he tries to undermine the credibility of the studies of identical twins which underlie current mainstream views.
There is something going on here. Such overweening intellectual ambition and contrarianism can't be driven solely by a dispassionate reassessment of the evidence. Fortunately, Professor Prinz is very upfront about the ideological motivations of his ideas. Like his CUNY colleague, Massimo Pigliucci, his intellectual work is inextricably bound up with his passionate commitment to progressive causes. The trouble is, mixing ideology and science is at best a distraction, a muddying of the waters, and at worst positively dangerous.
For his article, Miller also interviewed Geoffrey Miller of the University of New Mexico who effectively undermined the line which Prinz was taking by confirming what anyone with even a passing interest in these matters already knows: that studies of identical twins over the past two decades have demonstrated conclusively that virtually every aspect of personality is heritable (to a significant extent).
Steven Pinker, who has written on what he calls our language instinct as well as on broader issues of evolutionary psychology, is the most prominent public spokesman for the mainstream position which Prinz is setting out to attack. The following passage is from Pinker's book, The Blank Slate:
Identical twins, whether separated at birth or not, are eerily alike in just about any trait one can measure - verbal, mathematical and general intelligence, in their degree of life satisfaction, personality traits such as introversion, agreeableness, neuroticism, conscientiousness and openness to experience. They have similar attitudes towards controversial issues such as the death penalty, religion and modern music. They resemble each other in gambling, divorce, committing crimes, getting into accidents and watching television. They even boast dozens of shared idiosyncrasies such as giggling incessantly, giving interminable answers to simple questions, dipping buttered toast in coffee and writing indistinguishable syndicated advice columns.
If we want to improve our lives, the first step surely is to understand as best we can the situation we are in and this involves a recognition of the truly surprising power and influence of our genes.
There is something going on here. Such overweening intellectual ambition and contrarianism can't be driven solely by a dispassionate reassessment of the evidence. Fortunately, Professor Prinz is very upfront about the ideological motivations of his ideas. Like his CUNY colleague, Massimo Pigliucci, his intellectual work is inextricably bound up with his passionate commitment to progressive causes. The trouble is, mixing ideology and science is at best a distraction, a muddying of the waters, and at worst positively dangerous.
For his article, Miller also interviewed Geoffrey Miller of the University of New Mexico who effectively undermined the line which Prinz was taking by confirming what anyone with even a passing interest in these matters already knows: that studies of identical twins over the past two decades have demonstrated conclusively that virtually every aspect of personality is heritable (to a significant extent).
Steven Pinker, who has written on what he calls our language instinct as well as on broader issues of evolutionary psychology, is the most prominent public spokesman for the mainstream position which Prinz is setting out to attack. The following passage is from Pinker's book, The Blank Slate:
Identical twins, whether separated at birth or not, are eerily alike in just about any trait one can measure - verbal, mathematical and general intelligence, in their degree of life satisfaction, personality traits such as introversion, agreeableness, neuroticism, conscientiousness and openness to experience. They have similar attitudes towards controversial issues such as the death penalty, religion and modern music. They resemble each other in gambling, divorce, committing crimes, getting into accidents and watching television. They even boast dozens of shared idiosyncrasies such as giggling incessantly, giving interminable answers to simple questions, dipping buttered toast in coffee and writing indistinguishable syndicated advice columns.
If we want to improve our lives, the first step surely is to understand as best we can the situation we are in and this involves a recognition of the truly surprising power and influence of our genes.
Wednesday, December 7, 2011
Genetics and political orientation: some further thoughts
Let us assume that - as the research (which I discussed briefly in a previous post) seems to indicate - our political and other values are heavily influenced by genetic and genetic/environmental factors and even reflected in brain structures. What consequences flow from this?
First of all, it will make one skeptical about one's own political beliefs and values. As with someone 'born into' a particular religion, skepticism is definitely called for. But, just as my being born into a particular religion does not mean that the doctrines of that particular religion are necessarily false, so my having a genetic predisposition to believe or value certain things does not mean that these things are not true or valuable.
Even if our political beliefs were completely determined, this would not necessarily reflect on their truth, rightness, viability, plausibility - on their value and worth in other words. But are value and worth matters which can be objectively assessed?
I would suggest that the policy prescriptions of the right or the left or any other political perspective or orientation can be assessed in various ways. Whether particular methods or policies work in practice can be tested (and history can be seen as a record of such experiments). Science can be brought to bear on factual matters, from biology to economics. But basic values - such as whether to value equality over prosperity and individual freedom, etc. - seem not to be amenable to objective assessment.
Another lesson one might draw from the research is that people are different - every brain is unique, of course, but there are also differences which reflect general patterns of thought; and consequently changing someone's mind about a deep ideological issue will not be achieved simply by setting out a logical argument. Of course conversions occur, and people change their own minds (though often, as one of the commenters on the linked post said, as a result of much reading and reflection).
But presumably conversions occur when the new ideology is compatible with underlying brain structures, in other words when elements of that ideology are already present in a latent form. Given the research results, unconscious constraints and unconscious proclivities and tendencies clearly shape the possibilities for individual belief and orientation.
Knowing this, one would not try to convert everybody to one's own way of thinking, but rather accept that many would not be able (without major mental re-engineering) to value the things one values and so think the way one thinks about social issues. One would concentrate on those whose basic values were compatible with whatever social philosophy one was seeking to promote.
Unfortunately, much argument and debate is entered into with the assumption that we all have a more or less identical faculty which we call 'reason' - a kind of logic machine in our heads which determines our views. But - leaving aside areas like mathematics and formal logic - this is not the case. Our thinking is bound up with feeling and with (often unconscious) values. The research results undermine the view that debate and adversarial discussion are truth-seeking activities. There could be a more limited role for discussion, however, in helping those who have certain predispositions to develop a conscious and coherent social philosophy which accords with those predispositions.
It would be nice if we could have a workable dual or multi-choice social, political and economic system, so that we could all just gravitate towards the option we prefer; but unfortunately capitalism needs to be a universal system if it is to work properly. A dual capitalist/socialist (or free market/collectivist) system will fail because the wealth-producing (capitalist) part will always face increasing demands to subsidize the collectivist component.
In fact this is arguably what is happening today. Most Western countries, though nominally capitalist, have large public sectors which are major employers and providers of welfare. A dual (private/public) system operates in many areas of society: there are private schools and public schools, private hospitals and public hospitals, private health insurance and public health insurance, self-funded retirees and retirees on state pensions, and so on.
And - surprise, surprise - public debt is jeopardizing the future of many Western economies and threatening global prosperity.
First of all, it will make one skeptical about one's own political beliefs and values. As with someone 'born into' a particular religion, skepticism is definitely called for. But, just as my being born into a particular religion does not mean that the doctrines of that particular religion are necessarily false, so my having a genetic predisposition to believe or value certain things does not mean that these things are not true or valuable.
Even if our political beliefs were completely determined, this would not necessarily reflect on their truth, rightness, viability, plausibility - on their value and worth in other words. But are value and worth matters which can be objectively assessed?
I would suggest that the policy prescriptions of the right or the left or any other political perspective or orientation can be assessed in various ways. Whether particular methods or policies work in practice can be tested (and history can be seen as a record of such experiments). Science can be brought to bear on factual matters, from biology to economics. But basic values - such as whether to value equality over prosperity and individual freedom, etc. - seem not to be amenable to objective assessment.
Another lesson one might draw from the research is that people are different - every brain is unique, of course, but there are also differences which reflect general patterns of thought; and consequently changing someone's mind about a deep ideological issue will not be achieved simply by setting out a logical argument. Of course conversions occur, and people change their own minds (though often, as one of the commenters on the linked post said, as a result of much reading and reflection).
But presumably conversions occur when the new ideology is compatible with underlying brain structures, in other words when elements of that ideology are already present in a latent form. Given the research results, unconscious constraints and unconscious proclivities and tendencies clearly shape the possibilities for individual belief and orientation.
Knowing this, one would not try to convert everybody to one's own way of thinking, but rather accept that many would not be able (without major mental re-engineering) to value the things one values and so think the way one thinks about social issues. One would concentrate on those whose basic values were compatible with whatever social philosophy one was seeking to promote.
Unfortunately, much argument and debate is entered into with the assumption that we all have a more or less identical faculty which we call 'reason' - a kind of logic machine in our heads which determines our views. But - leaving aside areas like mathematics and formal logic - this is not the case. Our thinking is bound up with feeling and with (often unconscious) values. The research results undermine the view that debate and adversarial discussion are truth-seeking activities. There could be a more limited role for discussion, however, in helping those who have certain predispositions to develop a conscious and coherent social philosophy which accords with those predispositions.
It would be nice if we could have a workable dual or multi-choice social, political and economic system, so that we could all just gravitate towards the option we prefer; but unfortunately capitalism needs to be a universal system if it is to work properly. A dual capitalist/socialist (or free market/collectivist) system will fail because the wealth-producing (capitalist) part will always face increasing demands to subsidize the collectivist component.
In fact this is arguably what is happening today. Most Western countries, though nominally capitalist, have large public sectors which are major employers and providers of welfare. A dual (private/public) system operates in many areas of society: there are private schools and public schools, private hospitals and public hospitals, private health insurance and public health insurance, self-funded retirees and retirees on state pensions, and so on.
And - surprise, surprise - public debt is jeopardizing the future of many Western economies and threatening global prosperity.
Monday, October 17, 2011
Do genetic and environmental factors determine political orientation?
So often we see the truth of something, even talk or write about it, but don't fully realize the implications. And for me the implications of an idea which I have accepted for quite some time are finally, I think, sinking in. I'm talking about the idea that our - for want of a better word - ideological propensities (and perhaps values in general) are in large part determined by genetic and environmental factors.
Late last year and earlier this year there was a lot of publicity about a particular study (associated with the actor Colin Firth) concerning correlations between brain structure and political orientation. A paper detailing the results was published in April 2011 in Current Biology, and I had been meaning to have a close look at it, and perhaps to trace reactions and interpretations with a view to forming my own opinion on what it all might mean.
The study found that the gray matter volume of the anterior cingulate cortex was generally greater amongst university students identifying as liberal or left wing, while the right amygdala was larger in those who identified as conservative or right wing.
Predictably, a lot of nonsense was written by journalists and bloggers on the significance and implications of this piece of research - much of it along the lines that conservatives are less evolved!
It goes without saying that our knowledge of how brain structure and brain activity relate to thought and behavior is very limited. Research into these areas is at a very early stage and this study is a small piece of a very large and largely incomplete jigsaw puzzle. What the study does do, however, is to provide evidence that our political propensities are correlated to brain structures, which in itself is a profoundly important result. What it does not do is to validate value judgements about specific political propensities.
As the authors of the study point out, their research extends previous findings which related certain kinds of brain activity to political attitudes. Reference is also made to a study of twins which indicates that genetics plays a significant role in determining political views, and to other studies which have focused on the interaction between genetics and the social environment. "For example," the authors write, "political orientation in early adulthood is influenced by an interaction between a variant of a dopamine receptor gene linked with novelty seeking and an environmental factor of friendship."
Though not mentioned by the authors, research on birth order has thrown significant light on these issues. As I noted in a post last year, first-borns have been found to score higher on conservatism, conscientiousness and achievement orientation; later-borns on rebelliousness, openness and agreeableness. But, apparently, this pattern holds only within (rather than across) families because genetic effects are stronger than birth-order effects.
All in all, it is becoming increasingly clear that genetic and environmental factors play a big role in determining an individual's political orientation - and this is a hugely significant fact. When we engage in political (or similar kinds of) discussion and debate, we can no longer assume that we are dealing with people who - at least potentially - think like us. We all know from experience that such debate is usually (always?) futile, and at last, perhaps, we are beginning to understand why.
It is all very depressing for anyone who has been committed to the value of discussion and debate about values and politics. I want to face the implications of these findings head on. What consequences flow from them? Is ideological discussion a waste of time?
I'm still thinking about it.
Late last year and earlier this year there was a lot of publicity about a particular study (associated with the actor Colin Firth) concerning correlations between brain structure and political orientation. A paper detailing the results was published in April 2011 in Current Biology, and I had been meaning to have a close look at it, and perhaps to trace reactions and interpretations with a view to forming my own opinion on what it all might mean.
The study found that the gray matter volume of the anterior cingulate cortex was generally greater amongst university students identifying as liberal or left wing, while the right amygdala was larger in those who identified as conservative or right wing.
Predictably, a lot of nonsense was written by journalists and bloggers on the significance and implications of this piece of research - much of it along the lines that conservatives are less evolved!
It goes without saying that our knowledge of how brain structure and brain activity relate to thought and behavior is very limited. Research into these areas is at a very early stage and this study is a small piece of a very large and largely incomplete jigsaw puzzle. What the study does do, however, is to provide evidence that our political propensities are correlated to brain structures, which in itself is a profoundly important result. What it does not do is to validate value judgements about specific political propensities.
As the authors of the study point out, their research extends previous findings which related certain kinds of brain activity to political attitudes. Reference is also made to a study of twins which indicates that genetics plays a significant role in determining political views, and to other studies which have focused on the interaction between genetics and the social environment. "For example," the authors write, "political orientation in early adulthood is influenced by an interaction between a variant of a dopamine receptor gene linked with novelty seeking and an environmental factor of friendship."
Though not mentioned by the authors, research on birth order has thrown significant light on these issues. As I noted in a post last year, first-borns have been found to score higher on conservatism, conscientiousness and achievement orientation; later-borns on rebelliousness, openness and agreeableness. But, apparently, this pattern holds only within (rather than across) families because genetic effects are stronger than birth-order effects.
All in all, it is becoming increasingly clear that genetic and environmental factors play a big role in determining an individual's political orientation - and this is a hugely significant fact. When we engage in political (or similar kinds of) discussion and debate, we can no longer assume that we are dealing with people who - at least potentially - think like us. We all know from experience that such debate is usually (always?) futile, and at last, perhaps, we are beginning to understand why.
It is all very depressing for anyone who has been committed to the value of discussion and debate about values and politics. I want to face the implications of these findings head on. What consequences flow from them? Is ideological discussion a waste of time?
I'm still thinking about it.
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