genetics

Natural born warriors

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By Khaled Diab

Does scientific evidence that war is hardwired into human society mean that we are doomed to live in perpetual conflict?

November 2008

If war is a product of human culture, then there endures the possibility – no matter how remote it may seem at present – that we will, one day, learn to eradicate that scourge on our societies through cultural change and evolution.

 But what if it turns out that our species has a natural propensity to wage war and that warfare has had a profound influence on how humanity has evolved? According to an emerging theory, “not only is war as ancient as human kind… but it has played an integral role in our evolution”, New Scientist reported last week.

 Experts from numerous disciplines – anthropologists, archaeologists, primatologists, psychologists and political scientists – now seem to agree that warfare has affected our evolution and is, hence, hard-wired into our societies and behaviour. And it does not take a massive leap of logic to understand where they are coming from.

 One can quite easily imagine that competition over food and other scarce resources led our ancestors to take up arms against rival groups. This rivalry triggered an evolutionary cycle in which different groups would develop more elaborate ways of attacking their rivals and defending themselves against attack.

 This has taken us from the informal, small-scale group violence of our forebears – which was similar to that of related species, such as chimps – using simple stone weapons or spears, to the highly organised mobilisation of armies counting in the millions, armed with high-tech weaponry.

 Well, it’s not all bad news. Despite its huge cost to society, war can have some benefits, but whether these can ever outweigh the costs, especially of modern warfare, is doubtful. Just as military research sometimes creates useful spin-offs for society, evidence suggests that our evolution into effective warriors has helped equip us with out highly evolved ability to co-operate within society and work together towards common goals.

 If warfare, as this theory suggests, is a deeply ingrained aspect of human culture, does that mean we are doomed to live in perpetual conflict?

 The notion that war is a natural human tendency makes belief in its inevitability tempting, which can give warmongers an additional justification when beating the drums of conflict and it can take some of the wind out of opposition to war.

 But this would be an extremely flawed way of looking at this theory. Even if we are natural born warriors, we are also born pacifists and peacemakers. The species that cursed us with Adolf Hitler also blessed us with Mahatma Gandhi. In fact, the vast majority of humans and societies spend more time in peace than at war.

 In addition, a deeper understanding of what drives us to violence can help us develop the mechanisms to cope with it and dispel its causes. For instance, the type of warfare we are “naturally” predisposed to is more akin to gang wars which bear little resemblance to contemporary warfare.

 As Samuel Bowles, an economist at the Santa Fe Institute in New Mexico, emphasised, the decision to go to war is not simply some primal reflex, but is based on “some interplay between warfare and the alternative benefits of peace”.

 Given the massive costs in terms of both human lives and resources of modern warfare, we can only expect – and hope – that the “alternative benefits of peace” will increasingly get the upper hand. There are a number of promising examples of societies that have learnt that lesson, albeit the hard way.

 Germany and Japan, once the personification of jingoism, are spectacular examples of how societies geared to war can prosper and thrive when they turn their backs on conflict and transform their “swords into ploughshares”. And, for all its faults, the EU project has helped peace to reign on a continent once plagued by incessant warfare, including two world wars.

 Deeply ingrained as the war instinct is, we can evolve out of it, like we once evolved into it. Perceptions of group identity – the fearful 'us' versus 'them' dichotomy – play a major role, and are manipulated, in the march to war. If we can somehow elevate appreciation of our common humanity – and the common good – above the narrow self-interests of individual societies, then we have a hope of reining in the massive destructiveness of modern conflict.

 We have taken tentative steps along these lines, such as through the acknowledgement of our common humanity in the Universal Declaration of Human Rights. Now we need the necessary cultural shift and robust international legal order to make these principles a reality.

 

This column appeared in The Guardian Unlimited’s Comment is Free section on 22 November 2008. Read the related discussion.

This is an archive piece that was migrated to this website from Diabolic Digest

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Promises of immortality

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By Khaled Diab

Religion has been promising us eternal life after death for millennia, can science deliver us immortality right here on earth – and do we want it to?

4 July 2009

Death is up there with sex on the euphemism scale. When someone breathes their last, they don't simply "die". They pass away, go to a better place, meet their maker, give up the ghost – and more colourfully, bite the dust, push up the daisies or, with a hangman's macabre wit, kick the bucket. Why do people have so much trouble mentioning that unmentionable state? It is, as the morbidly glib never tire of reminding us, as natural as life. In fact, considering that we spend more time dead than alive – we may live to be 100 but we are classified as 'dead' forever after – it is perhaps a more natural state.

In addition to the grief and the sense of loss death conjures up, we, as a species, are scared to death of dying and so would rather not talk about it, in case that ancient superstition is true and we tempt fate and draw the unwanted attentions of Death. Well, fingers crossed and hearts crescented that the Grim Reaper or Azrael do not read The Guardian.

Our fear of and fascination with death have been the lifeblood of religion since time immemorial, and have left us with some of human civilisation's most impressive monuments. Religion promises us that death is not the end, but the beginning of a life immortal – if we're good, we go to heaven or are reincarnated as a higher being, and if we're bad … then hell hath no fury like a god scorned!

In the absence of faith, death takes on a whole other dimension. I feel a strange sense of emptiness and humility that, one day, I will only 'live on' in the consequences of my actions. Without the prospect of heaven and just an endless, empty void to look forward to, life, at first sight, can seem like hell. But since we're not going to be sentient of it, it's actually a pretty good prospect, especially since we're all likely to suffer eternal damnation according to one religious tradition or another.

After killing God and condemning humanity to death after death, can science fill the heaven-sized void left in our conscience? One scientist, Aubrey de Grey, is on a one-man mission to end the greying of the human condition and herald in the age of immortality.

The secret to becoming immortal lies not in some mysterious elixir of life but in the power of regenerative medicine. His 'strategies for engineered negligible senescence' (SENS) are based on rather the same concept as renovating or restoring an old house. Perhaps inspired by the religious significance of the number seven, De Grey has identified "seven deadly assassins" in our bodies – including our immune system – which, if combated, will allow us to live indefinitely.

Once a treatment for these seven deadly bodily sins has been developed, all that needs to occur is for a patient to spend a couple of months in hospital undergoing stem cell, gene therapies and vaccinations. Once they've checked out, a 60-year-old patient will have, say, the body of a 30-year-old, making them in theory immortal but not indestructible. This means that we would be left with the mind-boggling situation in which my mother could be physically younger than me.

Despite the eccentricity of his dream, De Grey is, in fact, not the first to tread this path. In fact, a humble jellyfish seems to have discovered the keys to eternity. Like an underwater Benjamin Button, the Turritopsis Nutricula is able to turn back its body clock and become a juvenile once it mates.

So how long will it be before we can become jellyfish-like immortals? According to De Grey, we will reach what he calls the "human longevity escape velocity" within 25 years. "We have at least a 10% chance that we'll not get there for another 100 years," he also cautioned in an interview with the BBC's Focus magazine. Not surprisingly, much of the scientific community is not impressed with De Grey's pseudo-prophetic promises of immortality.

Of course, there is a certain appeal to the idea of turning back your biological clock for real and having a second stab at youth but with the experience of age. But even if it were possible, would such an Everland be a utopia or a dystopia? Well, at first, such expensive technology is only likely to be available to the very rich and will act as a futuristic substitute for Botox and cosmetic surgery. Imagine what it would do to the class struggle if the more arrogant members of the upper crust not only acted like gods but lived like demigods?

Even if such treatment eventually becomes available on the NHS, it raises profound questions. Should people's lives be extended indefinitely? If not, should society or the individual choose when to pull the plug? Should a 250-year-old physical teen be treated as an adult and served alcohol or not? Would society take long-term threats, such as the environment, more seriously because people will actually live to see the consequences? Does living so long rob future generations of their right to life? Would you like to live in a society without death?

This column appeared in The Guardian Unlimited’s Comment is Free section on 2 July 2009. Read the related discussion.

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Survival of the nicest

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By Khaled Diab

The emerging notion that genes can be ‘selfless’ as well as ‘selfish’ suggests that working for the greater good is natural.

March 2009

Charles Darwin’s famous theory of natural selection and Richard Dawkin’s focus on the so-called ‘selfish gene’ are among the most widely misunderstood ideas of modern times.

At one end of the spectrum, creationist find the idea that we evolved from apes – or, worse still, that we can trace our lineage right back to single cell prokaryotes which emerged out of an inauspicious chemical soup of amino acids – insulting and believe that evolution is an elaborate excuse for a-morality. At the other end of the spectrum, the uglier manifestations of social Darwinism have completely misinterpreted the metaphor ‘survival of the fittest’ to justify their self-serving racist, imperialist and classist ideas.

But neither Darwin nor geneticists like Dawkins advocate the idea that cutthroat, ruthless competition is the only game in town, and co-operation between individuals, communities and even species permeates their work. Darwin even wrote in the Descent of Man that evolution would eventually lead a species to “acquire a moral sense or conscience”.

Still, while ‘selfish gene’ theories can explain a lot of behaviour, including co-operation and reciprocal altruism, they do not satisfactorily explain everything. Looking out for number one, no matter how enlightenedly individuals do it, cannot explain away all variations in human and animal conduct.

An extreme example of this is the enigma of why certain people are willing to lay down their lives for non-kin – soldiers, firefighters, accidental heroes and heroines. By saving the lives of people not related to them, they are actually putting the survival of their own genes in jeopardy.

Dawkins suggests that this can be explained by ‘misfiring’ – i.e. the application of an instinctive, genetic rule of thumb in situations it did not originally evolve to cover.

But could there be a ‘selfless gene’ out there? Could we be more than simple conduits or vessels which self-serving genes take for a ride? A growing number of scientists are beginning to advocate the existence of such selfless genes, i.e. genetic code that works to advance the survival of the group, species or even ecosystem above that of the individual.

Examples include genes that restrict how many offspring a predator has so as to avoid wiping out its prey, or genes that restrict the size of individuals within a species to limit its demand for food and other resources.

Dawkins himself sees some merit in species selection but not in group selection, because of the existence of ‘cheaters’ and ‘freeloaders’. But a few candidate examples of group selection have been identified and, as they actively look for them, scientists are finding more. Evidence is emerging that groups with the least number of cheaters thrive, while those with the largest number often perish, hence placing an evolutionary check on freeloaders.

One slimy example is microbial biofilms, which are colonies of bacteria living on a ‘commonwealth’ of slime that they secrete. Cheaters who live off the slime but do not contribute to it endanger the entire group, while colonies in which all bacteria pull their weight prosper.

By implication, this leads to the intriguing possibility that natural selection may operate, in one way or another, at the level of entire ecosystems. Some experiments have shown that ecosystem selection can and does occur, although other explanations cannot be ruled out.

If these ideas stand the test of time, they could revolutionise the way we view the natural world and our place in it. For instance, this might mean that ecosystems may react to climate change and other environmental pressures in unexpected ways that may not be explainable by the sum of their individual parts. In addition, it rings another alarm bell for humanity that if we don’t stop behaving like a ‘cancer’, nature may eventually find a way to evolve us out of the picture.

With imperfect and incomplete knowledge, it can be hard to tell how much science reflects reality and how much it reflects ingrained biases and prejudices. How much did the idea of the selfish gene fuel our individualistic, consumerist culture, and how much did the culture affect our interpretation of the scientific evidence? In contrast, how much is growing disenchantment with the notion that the dogged pursuit of self-interest will magically serve the greater good by harnessing greed skewing our view of the scientific evidence today?

To my mind, what is becoming increasingly clear is that co-operation is as ‘natural’ as competition, and that altruism is as natural as selfishness, and we need to find the right balance between the two. More importantly, our biology is only one factor in a complex equation and, ultimately, we are masters and mistresses of our own destiny.

This column appeared in The Guardian Unlimited’s Comment is Free section on 11 March 2009. Read the related discussion.

This is an archive piece that was migrated to this website from Diabolic Digest

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