Monday, December 11, 2017

How is American (and World) governance evolving?

So... what is the United State to become? From the recent outpouring of Op-Ed pieces you can take your choice: Autocracy, Plutocracy, Oligarchy, Kleptocracy... with liberal democracy viewed as vitally threatened. Articles by Thomas Edsall and Andrew Sullivan describe how American democracy is destroying itself, as Roger Cohen sadly notes the irreversible passing of the Pax Americana, an ordering of the world that began with Woodrow Wilson's 14 points speech one hundred years ago. David Frum outlines steps towards Autocracy as Jonathan Rauch discusses whether Trump will be able to govern as an authoritarian. Paul Krugman notes how the current tax reform will enormously enhance the ongoing process of entrenching a hereditary plutocracy that actually runs the country.  Articles by Fareed Zakaria and Thomas Edsall describe how the liberal establishment has failed to understand its own role in the rise of contemporary conservatism, how its social and economic policies have disadvantaged formerly middle class voters more motivated by issues surrounding religion, race, and culture than they are by economics, thus fueling a rise of nationalism, nativism and xenophobia in both the U.S. and Europe.  Regarding this last point, I want to paste in here the final paragraphs of an Edsall Op-Ed piece noting Eric Schnurer's argument that blue America has over the last decade declared war on the "red way of life."
The political, economic, and cultural triumph nationwide of a set of principles and realities essentially alien to large numbers of Americans is viewed as (a) being imposed upon them, and (b) overturning much of what they take for granted in their lives — and I don’t think they’re wrong about that. I think they’ve risen in angry revolt, and now intend to give back to the “elite” in the same terms that they’ve been given to. I don’t think this is good — in fact, I think it’s a very dangerous situation — but I think we need to understand it in order to responsibly address it.
Do liberals in fact need to understand — or empathize with — their many antagonists, the men and women who are sharply critical of the liberal project?
Steven Pinker, a professor of psychology at Harvard, observes that “believers in liberal democracy have unilaterally disarmed in the defense of the institution” by agreeing in many cases with the premise of the Trump campaign: “that the country is a hopeless swamp.” This left Democrats “defenseless when he proposed to drain it.” Where, Pinker asks,
are the liberals who are willing to say that liberal democracy has worked? That environmental regulations have slashed air pollutants while allowing Americans to drive more miles and burn more fuel? That social transfers have reduced poverty rates fivefold? That globalization has allowed Americans to afford more food, clothing, TVs, cars, and air-conditioners? That international organizations have prevented nuclear war, and reduced the rate of death in warfare by 90 percent? That environmental treaties are healing the hole in the ozone layer?
Pinker remains confident:
Progress always must fight headwinds. Human nature doesn’t change, and the appeal of regressive impulses is perennial. The forces of liberalism, modernity, cosmopolitanism, the open society, and Enlightenment values always have to push against our innate tribalism, authoritarianism, and thirst for vengeance. We can even recognize these instincts in ourselves, even in Trump’s cavalier remarks about the rule of law...Over the longer run, I think the forces of modernity prevail — affluence, education, mobility, communication, and generational replacement. Trumpism, like Brexit and European populism, are old men’s movements: support drops off sharply with age.
Pinker is optimistic about the future. I hope he is right.
The problem is that even if Pinker is right, his analysis does not preclude a sustained period in which the anti-democratic right dominates American politics. There is no telling how long it will be before the movement Trump has mobilized will have run its course. Nor can we anticipate — if and when Trumpism does implode — how extensive the damage will be that Pinker’s “forces of modernity” will have to repair.
But... what if all of this wringing of hands about changes the political order is a thin veneer over deeper changes that are really going to end up controlling the show?  One is seeing now the rise of a de facto world government of interlocked and interdependent giant corporations, mainly in the U.S. and China (think Apple and Foxconn) versed in the neuroeconomic techniques central to influencing the behaviors, desires, and consumptions of their subjects.  They are assembling a level of power that might increasingly override the ability of individual nation states to contest or control their actions.  Will this ensemble nudge towards mirroring the values of liberalism currently reflected in the public stances of the largest U.S. corporations, or will the political accommodations shown by  their Asian counterparts be more likely to prevail?

Friday, December 08, 2017

Dogs can smell our happiness and fear.

From D'Aniello et al:
We report a study examining interspecies emotion transfer via body odors (chemosignals). Do human body odors (chemosignals) produced under emotional conditions of happiness and fear provide information that is detectable by pet dogs (Labrador and Golden retrievers)? The odor samples were collected from the axilla of male donors not involved in the main experiment. The experimental setup involved the co-presence of the dog's owner, a stranger and the odor dispenser in a space where the dogs could move freely. There were three odor conditions [fear, happiness, and control (no sweat)] to which the dogs were assigned randomly. The dependent variables were the relevant behaviors of the dogs (e.g., approaching, interacting and gazing) directed to the three targets (owner, stranger, sweat dispenser) aside from the dogs' stress and heart rate indicators. The results indicated with high accuracy that the dogs manifested the predicted behaviors in the three conditions. There were fewer and shorter owner directed behaviors and more stranger directed behaviors when they were in the "happy odor condition" compared to the fear odor and control conditions. In the fear odor condition, they displayed more stressful behaviors. The heart rate data in the control and happy conditions were significantly lower than in the fear condition. Our findings suggest that interspecies emotional communication is facilitated by chemosignals.

Thursday, December 07, 2017

How Evil is Tech?

The title of this post is from an Op-Ed piece by David Brooks. Some clips:
There are three main critiques of big tech.
The first is that it is destroying the young. Social media promises an end to loneliness but actually produces an increase in solitude and an intense awareness of social exclusion. Texting and other technologies give you more control over your social interactions but also lead to thinner interactions and less real engagement with the world.
The second critique of the tech industry is that it is causing this addiction on purpose, to make money. Tech companies understand what causes dopamine surges in the brain and they lace their products with “hijacking techniques” that lure us in and create “compulsion loops.”
The third critique is that Apple, Amazon, Google and Facebook are near monopolies that use their market power to invade the private lives of their users and impose unfair conditions on content creators and smaller competitors. The political assault on this front is gaining steam.
The big breakthrough will come when tech executives clearly acknowledge the central truth: Their technologies are extremely useful for the tasks and pleasures that require shallower forms of consciousness, but they often crowd out and destroy the deeper forms of consciousness people need to thrive...Online is a place for human contact but not intimacy. Online is a place for information but not reflection.
Rabbi Abraham Joshua Heschel wrote that we take a break from the distractions of the world not as a rest to give us more strength to dive back in, but as the climax of living. “The seventh day is a palace in time which we build. It is made of soul, joy and reticence,” he said. By cutting off work and technology we enter a different state of consciousness, a different dimension of time and a different atmosphere, a “mine where the spirit’s precious metal can be found.”
Imagine if instead of claiming to offer us the best things in life, tech merely saw itself as providing efficiency devices. Its innovations can save us time on lower-level tasks so we can get offline and there experience the best things in life.
Imagine if tech pitched itself that way. That would be an amazing show of realism and, especially, humility, which these days is the ultimate and most disruptive technology.

Wednesday, December 06, 2017

Trust and cooperation across societies.

Romano et al. (open source) offer, in a study over 17 countries, an example of the kind of research needed to understand and enhance cooperation within and between groups.

Significance
In a study including 17 societies, we found that people are motivated to trust and cooperate more with their ingroup, than harm the outgroup. Reputation-based indirect reciprocity may offset this ingroup favoritism, because we found that reputational concern universally increases cooperation with both ingroup and outgroup members. We also found that people who are dispositionally cooperative are less parochial and more universal in their cooperation. In a time of increasing parochialism in both domestic and international relations, our findings affirm us of the danger of the strong human universal toward parochial altruism. Yet, our findings suggest that in all societies, there exist people whose cooperation transcends group boundaries and provides a solution to combating parochialism: reputation-based indirect reciprocity.
Abstract
International challenges such as climate change, poverty, and intergroup conflict require countries to cooperate to solve these complex problems. However, the political tide in many countries has shifted inward, with skepticism and reluctance to cooperate with other countries. Thus, cross-societal investigations are needed to test theory about trust and cooperation within and between groups. We conducted an experimental study in 17 countries designed to test several theories that explain why, who, and where people trust and cooperate more with ingroup members, compared with outgroup members. The experiment involved several interactions in the trust game, either as a trustor or trustee. We manipulated partner group membership in the trust game (ingroup, outgroup, or unknown) and if their reputation was at stake during the interaction. In addition to the standard finding that participants trust and cooperate more with ingroup than outgroup members, we obtained findings that reputational concerns play a decisive role for promoting trust and cooperation universally across societies. Furthermore, men discriminated more in favor of their ingroup than women. Individual differences in cooperative preferences, as measured by social value orientation, predicted cooperation with both ingroup and outgroup members. Finally, we did not find support for three theories about the cross-societal conditions that influence the degree of ingroup favoritism observed across societies (e.g., material security, religiosity, and pathogen stress). We discuss the implications for promoting cooperation within and between countries.

Tuesday, December 05, 2017

The emotional political base supporting the consolidation of the U.S. plutocracy.

I want to pass on the ending paragraphs from a piece by Fareed Zakaria:
Is it that the Republican Party is cleverly and successfully hoodwinking its supporters, promising them populism and enacting plutocratic capitalism instead? This view has been a staple of liberal analysis for years, most prominently in Thomas Frank’s book “What’s the Matter with Kansas?” Frank argued that Republicans have been able to work this magic trick by dangling social issues in front of working-class voters, who fall for the bait and lose sight of the fact that they are voting against their own interests. Both Wolf and Pierson believe that this trickery will prove dangerous for Republicans. “The plutocrats are riding on a hungry tiger,” writes Wolf.
But what if people are not being fooled at all? What if people are actually motivated far more deeply by issues surrounding religion, race and culture than they are by economics? There is increasing evidence that Trump’s base supports him because they feel a deep emotional, cultural and class affinity for him. And while the tax bill is analyzed by economists, Trump picks fights with black athletes, retweets misleading anti-Muslim videos and promises not to yield on immigration. Perhaps he knows his base better than we do. In fact, Trump’s populism might not be as unique as it’s made out to be. Polling from Europe suggests that the core issues motivating people to support Brexit or the far-right parties in France and Germany, and even the populist parties of Eastern Europe, are cultural and social.
The most important revolution in economics in the past generation has been the rise of the behavioral scientists, trained in psychology, who are finding that people systematically make decisions that are against their own “interests.” This might be the tip of the iceberg in understanding human motivation. The real story might be that people see their own interests in much more emotional and tribal ways than scholars understand. What if, in the eyes of a large group of Americans, these other issues are the ones for which they will stand up, protest, support politicians and even pay an economic price? What if, for many people, in America and around the world, these are their true interests?

Monday, December 04, 2017

A mind reading machine?

Not quite, but Matthew Hutson points to work by Wen et al. using an artificial neural network to categorize fMRI signals from subjects watching different categories of images. The algorithm could predict with about 50% accuracy which of 15 classes of visual object a subject was watching. His description:
Artificial intelligence has taken us one baby step closer to the mind-reading machines of science fiction. Researchers have developed “deep learning” algorithms—roughly modeled on the human brain—to decipher, you guessed it, the human brain. First, they built a model of how the brain encodes information. As three women spent hours viewing hundreds of short videos, a functional MRI machine measured signals of activity in the visual cortex and elsewhere. A popular type of artificial neural network used for image processing learned to associate video images with brain activity. As the women watched additional clips, the algorithm’s predicted activity correlated with actual activity in a dozen brain regions. It also helped the scientists visualize which features each area of the cortex was processing. Another network decoded neural signals: Based on a participant’s brain activity, it could predict with about 50% accuracy what she was watching (by selecting one of 15 categories including bird, airplane, and exercise). If the network had trained on data from a different woman’s brain, it could still categorize the image with about 25% accuracy, the researchers report this month in Cerebral Cortex. The network could also partially reconstruct what a participant saw, turning brain activity into pixels, but the resulting images were little more than white blobs. The researchers hope their work will lead to the reconstruction of mental imagery, which uses some of the same brain circuits as visual processing. Translating from the mind’s eye into bits could allow people to express vivid thoughts or dreams to computers or to other people without words or mouse clicks, and could help those with strokes who have no other way to communicate.

Friday, December 01, 2017

Bringing big science to psychology

Chawla describes a new initiative dubbed the "Psychological Science Accelerator" (PSA) that:
...has so far forged alliances with more than 170 laboratories on six continents in a bid to enhance the ability of researchers to collect data at multiple sites on a massive scale...to enable researchers to expand their reach and collect “large-scale confirmatory data” at many sites.
A selection committee has evaluated eight proposals and selected one based on experiments already replicated in the US and the UK.
It aims to discover whether the research findings of Alexander Todorov, a psychologist at Princeton University, can be replicated on a global scale. Todorov has reported that people rank human faces on two components: valence and dominance. Valence is a measure of trustworthiness, whereas dominance is a measure of physical strength...More than 50 of PSA’s collaborating labs have already committed to collect data as part of the study.
PSA isn’t the only effort aiming to change how researchers conduct psychological studies, which have received extensive criticism for a lack of reproducibility. Others include the Many Labs Replication Project and the Pipeline Project. Earlier this year, Chartier also launched StudySwap, an online platform designed to help researchers find collaborators for replication studies and exchange resources.

Thursday, November 30, 2017

Speed of processing training results in lower risk of dementia

While brain training exercises in general are not receiving a very good press these days, experiments testing effects of BrainHQ's speed of processing exercise called "Double Decision" have been the most convincing. I've tried it out several times, feel like it perks me up quite a bit for awhile, then get really bored repeating it and stop.

In the exercise, you see an image in the center of your vision–for example, either a car or a truck–and at the same time, you see another image way off in your peripheral vision. The images are only on the screen for a brief period of time–well under a second. You then have to say whether you saw the car or the truck in the center of your vision, and then you have to show where you saw the image in your peripheral vision. This challenges the speed and the accuracy of your visual system. And as you get faster and more accurate, the speed increases and the peripheral vision task gets more demanding–pushing your brain further.

Edwards et al. (open source)  now report a randomized controlled trial among 2,802 initially healthy older adults, which examined the efficacy of three cognitive training programs (memory, reasoning, or speed of processing) relative to a no-contact control condition. They found that healthy older adults randomized to the Double Decision speed of processing cognitive training, but not memory or reasoning training, had a 29% reduction in their risk of dementia after 10 years of follow-up compared to the untreated control group.

Wednesday, November 29, 2017

Behavior modification empires.

I have to pass on this clip from a Maureen Dowd interview of Jaron Lanier
Mr. Lanier believes that Facebook and Google, with their “top-down control schemes,” should be called “Behavior Modification Empires.”
“The whole internet thing was supposed to create the world’s best information resource in all of history,” he says. “Everything would be made visible. And instead we’re living in this time of total opacity where you don’t know why you see the news you see. You don’t know if it’s the same news that someone else sees. You don’t know who made it be that way. You don’t know who’s paid to change what you see. Everything is totally obscure in a profound way that it never was before.“
And the belief system of Silicon Valley is so thick that my friends at Facebook simply still really believe that the answer to any problem is to do more of what they already did, that they’re optimizing the world.
“The Facebook business model is mass behavior modification for pay. And for those who are not giving Facebook money, the only — and I want to emphasize, the only, underlined and in bold and italics — reward they can get or positive feedback is just getting attention. And if you have a system where the only possible prize is getting more attention, then you call that system Christmas for Asses, right? It’s a creep-amplification device.
“Once Facebook becomes ubiquitous, it’s a sort of giant protection racket, where, if you don’t pay them money, then someone else will pay to modify the behavior to your disadvantage, so everyone has to pay money just to stay at equilibrium where they would have been otherwise,” he says. “I mean, there’s only one way out for Facebook, which is to change its business model. Unless Facebook changes, we’ll just have to trust Facebook for any future election result. Because they do apparently have the ability to change them. Or at least change the close ones.”
Why would Facebook change its business model when it’s raking in billions?
“I would appeal to the decency of the people in it,” he replies. “And if not to them, then the toughness of the regulators. It’s going to be one of the struggles of the century.”

Tuesday, November 28, 2017

People who seek solitude are more creative.

Ingraham points to an article by Bowker et al. that makes me feel better about my desire for and comfort with a substantial period of solitude each day. With a psychobabble title like "How BIS/BAS and psycho-behavioral variables distinguish between social withdrawal subtypes during emerging adulthood." I never would have come across the message of this article on my own. You have to read down about three paragraphs into the article to discover that BIS and BAS refer to neurobiological behavioral inhibition and behavioral approach systems. The study is conducted on the usual gaggle of 295 WEIRD (Western, Educated, Industrialized, Rich and Democratic) US college students taking a large introductory psychology course. The study makes the point that not all forms of social withdrawal are harmful. In fact there is a correlation between seeking out solitude and creativity. Bowker and colleagues used a standard battery of psychological assessments to show, in Ingraham's words, that:
People who were shy or antisocial scored lower than average on the measure of creativity. But people who were “unsociable” — those who sought out solitude — scored higher on creativity.
Unsociable people, in other words, “may be able to spend their time in solitude constructively, unlike shy and avoidant individuals who may be too distracted and/or preoccupied by their negative cognitions and distress,” the authors posit.
Other research — and indeed, the life experiences of many famously creative people — back up this notion. The solitary genius is a familiar trope in Western society. Think of Thoreau in his cabin, Van Gogh alone in an asylum and Beethoven's withdrawal into silent solitude.
Research also has found (cf. Long and Averill) that highly intelligent people are happier when they have fewer friends. They might spend less time socializing because they are focused on some other longer term objective.

Monday, November 27, 2017

How to turn conservatives into liberals.

John Bargh and collaborators have done another interesting piece of work on how implicit biases can influence us. I pass on their abstract and the first part of their introduction to the article:
Across two studies, we find evidence for our prediction that experimentally increasing feelings of physical safety increases conservatives' socially progressive attitudes. Specifically, Republican and conservative participants who imagined being endowed with a superpower that made them invulnerable to physical harm (vs. the ability to fly) were more socially (but not economically) liberal (Study 1) and less resistant to social change (Study 2). Results suggest that socially (but not economically) conservative attitudes are driven, at least in part, by needs for safety and security.
In the first inaugural address of Franklin D. Roosevelt (1938), given amidst the widespread disquiet of the Great Depression, the president famously warned Americans that their fear could serve as a psychological impediment to much needed social change. Decades later, research bears out Roosevelt's supposition: Across several disciplines and methodologies, research consistently demonstrates an association between threat, broadly defined, and political conservatism. Such work has shown that: (i) political conservatives are, on average, more likely to perceive threat than their liberal counterparts; and (ii) the existence of threat, in myriad forms, is associated with increased endorsement of conservative attitudes that resist efforts toward social change. Here, we test the novel hypothesis that the opposite of threat—that is, heightened feelings of safety—will increase socially progressive beliefs, especially among conservatives. Specifically, we test the prediction that experimentally inducing feelings of safety will increase social liberalism among Republicans (Study 1) and acceptance of social change among conservatives (Study 2).

Friday, November 24, 2017

Common cause of jihad and the Alt-Right

I pass on some clips from an essay by Scott Atran, who is the director of research in anthropology at the CNRS, École Normale Supérieure, and a senior research fellow at the University of Oxford.
Whether alt-Right or radical Islam, the values of liberal and open democracy increasingly appear to be losing ground around the world to those of narrow, xenophobic ethno-nationalisms and radical ideologies. ..According to the World Values Survey, the majority of Europeans do not believe that living in a democratic country is ‘absolutely important’ for them. ..in the US, political scientists Roberto Foa and Yascha Mounk find that nearly half of American citizens lack faith in democracy; more than one-third of young high-income earners actually favour army rule, presumably to halt rising social unrest linked to income inequality, job insecurity, and persistent failures in racial integration and cultural assimilation in an age of identity politics.
It was religious philosopher Søren Kierkegaard who first discussed ‘the dizziness of freedom’ and the social disruption that it creates. Seizing on the idea in Escape from Freedom (1941), humanist philosopher Erich Fromm argued that too much freedom caused many to seek elimination of uncertainty in authoritarian systems. This has combined with what social psychologist Arie Kruglanski calls ‘the search for significance’, propelling both violent jihadists and militant supporters of populist ethno-nationalist movements worldwide.
Today, the parallels between the alt-Right and radical jihadism are clear, White-supremacist and jihadi groups parallel one another not only in strategy and tactics, but also in messaging. Klansman and Aryan Nations member Louis Beam published his 1983 manifesto, ‘Leaderless Resistance’, in The Seditionist in 1992 , as a social resistance strategy for white nationalists. Like the jihadi movement, it rejects commanding anti-government acts from the leaders of a top-down hierarchy in favour of letting independent groups and individuals act on their own. And it rejects direct messaging in favour of inferred messaging – all to prevent authorities from decapitating the movement or assigning legal responsibility for cause and effect.
There are leaders, of course – founders of groups, or those who analyse conditions and formulate plans. Whether jihadist or alt-Right, these figures are often educated and well-off. Osama bin Laden was famously a multimillionaire who studied economics and civil engineering. His successor as head of al-Qaeda, Ayman al-Zawahiri, is a surgeon from a distinguished and prosperous family of doctors and scholars. ISIS leader Abu Bakr al-Baghdadi received a PhD from the University of Baghdad. Charles Lindbergh was not just an aviator but the son of a lawyer and a US Congressman. William Pierce was a physicist descended from Southern aristocracy. Richard Spencer, the president of the alt-Right’s pre-eminent think tank, the National Policy Institute, is the son of an ophthalmologist and an heir to a cotton-field fortune, who received his MA in humanities from the University of Chicago. Across the wide swath of revolutionary and insurgent groups, founders are usually members of the middle or upper class, who then reach out to the more marginalised, less educated and poorer masses to increase potency.
From jihadis in Europe to white supremacists in the US, people most susceptible to joining radical groups are youth in their teens and 20s seeking community and purpose. The attraction of community is especially keen where there are sentiments of social exclusion or community collapse, whether or not accompanied by economic deprivation. It is a sense of purpose that most readily propels action and sacrifice, including a willingness to fight and die – especially when that purpose is perceived to be in defence of transcendent values dissociated from material costs or consequences.
…what messages could compete?… we must embed ourselves within actual communities to understand which approach may work best. A necessary focus of this effort must be youth, who form the bulk of today’s extremist recruits and tomorrow’s most vulnerable populations. Volunteers for al-Qaeda, the Islamic State, and many extreme nationalist groups are often youth in transitional stages in their lives – immigrants, students, people between jobs and before finding their mates. Having left their homes, they seek new families of friends and fellow travellers to find purpose and significance. The ability to understand the realities facing young people will determine whether the transnational scourge of violent extremism continues and surges or abates.

Thursday, November 23, 2017

How gratitude changes you and your brain.

Thanksgiving day is an appropriate time to point to two articles from the Greater Good Magazine.

Wong and Brown describe work on writing gratitude letters suggesting that this improves mental health, and in the usual 'preliminary' fMRI studies.
"...when we compared those who wrote the gratitude letters with those who didn’t, the gratitude letter writers showed greater activation in the medial prefrontal cortex when they experienced gratitude in the fMRI scanner. This is striking as this effect was found three months after the letter writing began. This indicates that simply expressing gratitude may have lasting effects on the brain."
And, Fox discusses her work:
...our data suggest that because gratitude relies on the brain networks associated with social bonding and stress relief, this may explain in part how grateful feelings lead to health benefits over time. Feeling grateful and recognizing help from others creates a more relaxed body state and allows the subsequent benefits of lowered stress to wash over us.

Wednesday, November 22, 2017

A debate on the pros and cons of aging and death.

I want to pass on the final comments from a debate between Allen Frances (a professor emeritus at Duke University who was the chairman of the DSM-IV task force) and his grandson Tyler, who participates in genetics and stem cells research relevant to extending lifespan. Frances’ article gives a point by point summary of their ongoing debate, and is well worth reading.
There is a disturbing myth from ancient Greece. Aurora, the immortal goddess of the dawn, falls so deeply in love with a mortal man that she cannot accept losing him to death. She pleads successfully with the Olympian gods to grant him immortality, but forgets to request that he also be gifted with perpetual youth. Her human lover Is thus punished with the worst of fates- interminable life, daily made more intolerable by progressive aging and deterioration. Jonathan Swift illustrated the same chilling issue in Gulliver’s Travels and also tragically in his own long, tortured, and undignified death from dementia. 
Modern medicine has cursed an increasing percentage of our aging population to suffer this miserable fate- an artificially prolonged life preventing a natural and peaceful death. Medicine is, so far, much more advanced in keeping elderly people alive than in keeping them well. Our goal should be enhanced health, not a longer existence if that existence is painful and has lost all meaning. Medicine should help people live well, but also let them die peacefully and with dignity. 
Tyler is much more optimistic than I that we will soon have the technical means to prolong youth and postpone death- and that we should use them. I am more accepting of the limits of life- eager to improve its quality, rather than expecting to extend its duration. Tyler trusts scientists to make scientific decisions. I believe that scientists have conflicts of interest that make them uniquely unqualified to judge the ethical implications of the scientific opportunities open to them. If scientists can do something, they will do it- fairly heedless of unintended consequences. Tyler has the optimism and enthusiasm of the young. I have the pessimism and caution of the old. 
In a final flourish, Tyler trumped my argument that aging and death are somehow natural to the evolutionary scheme of things with the paradox that evolution has also given us the power to control aging and death and that surely we are programed to use it.
He is probably right. I don’t think our debate will be settled on ethical or theoretical grounds. History provides precious few examples of a society voluntarily rejecting the application of a powerful new technology- e.g., China burning its navy in the fifteenth century; Japan banning guns in the seventeenth. But both were closed societies whose conservative decisions were governed by internal political concerns; they were much less responsive than ours to economic and scientific competition and pressure. 
My guess is that scientists will be given the freedom and the funding to follow every possible path to the fountain of youth and to doubling the lifespan.
If they succeed, some chosen few of humanity will enjoy great benefits, while the masses may suffer even more than they do today and our environment may decay even faster than it already has. But I find aesthetic comfort in the firm belief that the scientists won’t be able to deliver on their extravagant promises. Although our knowledge base is increasing exponentially, the more we learn about the body, the more we appreciate how difficult it is to translate basic science into clinical application. Our bodies are remarkably complex and carefully balanced machines. Scientists can tinker with them, but I suspect that the basic cycle of life and death will be very hard to change.