Modern genetics and how they don’t really mean much.

There is a new book called “How to argue with a racist”, by Adam Rutherford.  Writing  at a time when genetic services such as 23 and Me are being used by huge numbers of people, Rutherford points out that the last common ancestor of all people with long-standing European ancestries lived only 600 years ago.  Indeed the experts say that nearly everyone with British ancestry is almost certainly descended from King Edward III.  And every person alive in 10th Century Europe, and who left descendants, is an ancestor of all Europeans alive today.

Ancestry studies show that we are all mongrels and that there is no such thing as “racial purity”.  Every white supremacist and racist has African, Indian, Chinese.,  Native American and even indigenous Australian ancestors of some sort. The idea that small genetic variations in between racial groups have an influence on behavior is totally discredited.  Skin color is the most visible difference between people who are otherwise all remarkably similar, born with a wide variety of capabilities and potential.  Race is a social construct, powerful still and a curse, but something that allows one person to feel superior to someone else.

As for this writer, he claims to be descended from, yes, Edward III, also King Louis XV of France and the Holy Roman Emperor Sigismund 1368 – 1437. (a notorious fellow for the ladies, it is said).  This just shows how silly all this is, since is does me no good at all, and you probably don’t believe it anyway.

Extinction

The outlook for wildlife would be grim even if the world wasn’t warming. According to a major report last year, 1 million species could soon be wiped out – a sixth mass extinction.  The main cause at present is the loss of habitat, but over this century the changing climate is expected to push ever more species over the brink.. For many plants and animals, their current habitats will simply get too hot. Many are already moving to stay in their comfort zone. In the oceans, some organisms have shifted their ranges by hundreds of kilometres.

But on land there are few spaces left for animals to relocate to, and those that do exist are highly fragmented, which makes it very hard for wildlife to adapt. In polar regions, the loss of sea ice is posing problems for the polar bear and other animals. In Bangladesh Bengal tigers are clinging on in the mangrove swamps of the Sundarbans, but by 2070 there might be no suitable habitat left for them.

New protected areas are necessary as the world warms and coasts flood, along with corridors that allow animals to move between such places. But almost nothing is being done about warming in the rich countries, let alone in poorer countries ones.

It’s inevitable that a population crash will happen unless they are able to move. When Defenders of Wildlife, based in Washington DC, analysed official plans for saving 459 animals in the US that could soon go extinct, they found only 18% of the strategies included specific plans to compensate for climate change. The situation is similar elsewhere, such as Australia, and, as for plants, researchers have concluded that some 240 plants are at high risk of going extinct because of climate change. There are no plans at all for saving most of these species.

Why is this? A lack of resources, an inability to believe that things could get as bad as forecast, a reluctance to intervene and a focus on short-term threats such as invasive species? (a precised versión of a article in New Scientist, Jan 4, 2020)

If the planet keeps warming, entire habitats could disappear along with all the species that rely on them.   Examples? Most coral reefs, the Emperor penguin and the entire  Amazon rainforest.   Limiting global warming is essential.  Denial is an irresponsible cop-out.

Falling in love

“I have recently fallen head over heels in love, but my cynical friends keep telling me that love is nothing but a cocktail of pheromones, dopamine and oxytocin, and that these wear off after a couple of years. The thought scares me, it makes the whole thing seem meaningless. Is love really just brain chemistry?”  – Jo, London.

.The essence of love, at least of passionate, romantic love, is revealed in its very grammar. We “fall” in love, not “wander” into it.  We fall “head over heels”, often at “first sight” rather than on careful inspection. We fall in love, “madly, blind” to the other’s vices, not in rational appraisal of their virtues.

Romantic love is overwhelming, irresistible, ballistic. It is in control of us more than we are ever in control of it. In one sense a mystery, it is in another pure simplicity – its course, once engaged, predictable and inevitable, and its cultural expression more or less uniform across time and space. The impulse to think of it in terms of simple causes precedes science. Consider the arrow of Cupid, the potion of a sorcerer – love seems elemental.

Yet love is not easily conquered by science.  Sex pheromones, chemicals designed to broadcast reproductive availability to others, are often quoted as key instruments of attraction.  It is an appealing idea. But while pheromones play an important role in insect communication, there is very little evidence that they even exist in humans.

But if a chemical can signal attraction outside the body, why not inside it? The neuropeptide oxytocin, often inaccurately described as a “bonding hormone” and known for its role in lactation and uterine contraction, is the leading candidate here. This has been extensively studied, mainly in the prairie vole whose monogamy and public displays of affection make it an ideal model.  Blocking oxytocin disrupts the pair bonding that here is a surrogate for love, and makes the voles more restrained in their emotional expressions. Conversely, inducing an excess of oxytocin in other, non-monogamous vole species blunts their taste for sexual adventure. In humans, though, the effects are much less dramatic – a subtle change in the romantic preference for the familiar over the new. So oxytocin is far from proven to be essential to love.

Of course, even if we could identify such a substance, any message – chemical or otherwise – needs a recipient. So where is the letterbox of love in the brain? And how is the identity of the “chosen one” conveyed, given that no single molecule could possibly encode it?

When romantic love is examined with imaging of the brain, the areas that “light up” overlap with those supporting reward-seeking and goal-oriented behaviour. But that parts of our brains are set ablaze by one thing does not tell us much if they are just as excited by a very different, other thing. And the observed patterns of romantic love are not that different from those of maternal bonding, or even from the love of one’s favourite football team.  So we can only conclude that neuroscience is yet to explain this “head over heels” emotion in neural terms.

Do we simply need more experiments? Yes, is usually the scientist’s answer, but this assumes love is simple enough to be captured by a mechanistic description. Each reproductive decision can be neither simple nor uniform, for we cannot be allowed to be guided by any single characteristic, let alone the same one. Universally attractive though tallness might be, if biology allowed us to select on height alone we would all be gigantic by now. And if the decisions have to be complex, so must the neural apparatus that makes them possible.

While this explains why romantic attraction must be complex, it doesn’t explain why it can feel so instinctual and spontaneous.  Wouldn’t a cool, detached rationality be better? The answer is “no”.  Rationality evolved later that our instincts and allows us to detach ourselves from the grounds for a decision so that others can record, understand and apply it independently of us.  

Nor is instinct ”simple”and inferior to careful deliberation. It is actually more sophisticated than rational analysis, for it brings into play a wider array of factors than we could ever hold simultaneously in our conscious minds. The truth of this stares us in the face: think how much better we are at recognising a face compared with describing it. Why should the recognition of love be any different?

Ultimately, if the neural mechanisms of love were simple, you should be able to induce it with an injection, to extinguish it with a scalpel while leaving everything else intact. The cold, hard logic of evolutionary biology makes this impossible. Were love not complicated, we would never have evolved in the first place.

That said, love – like all our thoughts, emotions and behaviours – arises from very complex physical processes in the brain.  Yet to say that love is “just” brain chemistry is like saying Romeo and Juliet is “just” words – it misses the point. Like art, love is more than the sum of its parts. It is exhilarating! 

So those of us lucky to experience its chaos should let ourselves be carried by the waves. And if we end up wrecked on the surf-hidden rocks, we can draw comfort from knowing reason would have got us no further. (BBC News Feb 14 2020).

My comment:  To quote the words of a lovely popular love song by Ray Noble: “Love is the sweetest thing.  What else on earth could ever bring such happiness to everything?”

The trouble with the nuclear family

( A bit long, but very important)

In an essay for the Atlantic  – The Nuclear Family was a Mistake — New York Times columnist David Brooks argues that the family structure we’ve held up as the cultural ideal for the past half century has been a catastrophe for many.  By “nuclear family,” he means a married mother and father and some kids. The alternative arrangement was “the extended family,” which included not only Mom, Dad and the children but also close relatives — cousins, aunts, uncles and grandparents — as well as family friends.

 

The great defect of the nuclear family, Brooks asserts, is that if there’s a crisis — a death, divorce, job loss, poor school grades — there’s no backup team. Children are most vulnerable to these disruptions and often are left to fend for themselves. There’s a downward spiral. “In many sectors of society,” Brooks writes, “nuclear families fragmented into single-parent families, [and] single-parent families into chaotic families or no families.”

 

The advent of the birth-control pill encouraged people to have sex outside of marriage. Women’s entrance into the labor market made it easier for them to support themselves. Modern appliances (washing machines, dryers) made housework simpler.

 

As Brooks sees it, almost everyone loses under this system. The affluent can best cope with it, but children have it worst. Brooks cites an avalanche of statistics. In 1960, about 5 percent of children were born to unmarried women. Now that’s about 40 percent. In 1960, about 11 percent of children lived apart from their fathers; in 2010, the figure was 27 percent.

 

Adult men and women also have their share of troubles. There’s a vicious circle involved: “People who grow up in disrupted families have more trouble getting the education they need to have prosperous careers. People who don’t have prosperous careers  may have trouble building stable families. The children in those families become more isolated and more traumatized.”

 

There is little doubt that reversing the breakdown of families, and its consequences, is one of the urgent tasks of social policy in the 21st century. We have been struggling unsuccessfully with it since Daniel Patrick Moynihan, who later became a U.S. senator, warned in the Moynihan Report in  1965 that the breakdown of black marriage rates would have a devastating effect on African Americans’ well-being. The report proved highly controversial, and some branded Moynihan a racist.

 

But there is a problem.  The conditions needed to broach a debate over family policies strike at the heart of Americans’ political and cultural conflicts. Brooks writes:

“We value privacy and individual freedom too much. We want stability and rootedness, but also mobility, dynamic capitalism, and the liberty to adopt the lifestyle we choose.”

 

Brooks finds both liberals and conservatives unequal to the task of dealing candidly with family breakdown. “Social conservatives insist that we can bring the nuclear family back. But the conditions that made for stable nuclear families in the 1950s are never returning. Conservatives have nothing to say to the kid whose dad has split, whose mom has had three other kids with different dads; ‘go live in a nuclear family’ is really not relevant advice.  The majority [of households] are something else: single parents, never-married parents, blended families, grandparent-headed families.” He’s just as tough on progressives. They “still talk like self-expressive individualists of the 1970s: People should have the freedom to pick whatever family form works for them. But many of the new family forms do not work well for most people.”

 

The larger issue is how we judge our times. We are constantly deluged with economic studies and statistics, implying that economic outcomes are the only ones that matter. The national scorecard of well-being should take a much broader view. How well families do in preparing children for adulthood and how well they transmit important values is a much higher standard for success.  (David Brooks, The Atlantic, lightly edited) 

Traffic chaos in the US

The recent death of Kobe Bryant in a helicopter crash wasn’t just a tragedy for his family and for basketball fans.  It was also “a sign of the times”: that even the rich and famous now can’t avoid “the traffic hellscape that American cities have created for their residents”.

Like everyone else in southern California, Bryant was sick of the permanent motorway gridlock that degrades the quality of life there. The average Los Angeles commuter spends 119 hours – about three full work weeks – stuck in traffic each year. And it’s not just LA; the problem is getting worse everywhere. Across the US, the average commuter wastes 54 hours a year in traffic, up from 20 hours in 1982.

Funding for mass transit just hasn’t kept up with population growth. This is why the wealthy, and even the not so wealthy, are increasingly turning to small planes or shelling out $200 for a seat on a chopper to get around. This in turn is leading to dangerously congested airspace over cities – a factor that led air traffic controllers to put Bryant’s helicopter in a holding pattern just before it crashed.

Last year, LA police recorded 236 deaths as a result of traffic accidents on the city’s overcrowded roads; both they and Bryant are “victims of failing public infrastructure”.  (Nicole Gelinas,  New York Post, 15 Feb 2020)

Many years ago the motor car industry, in league with the oil companies ( Henry Ford, Standard Oil and others) poured large sums into pockets of local politicians in order to kill  any idea of investment in mass public transport.  Their campaign was successful; nowadays bus and train are the cinderella’s of transport, and most available money goes to easing the path of car commuters.

When you observe lobbyists today think on the rich people and organizations whose money and political clout prevented a sensible balance of cars, buses and trains all those years ago. What similar people are doing now will impact future generations quite as much as Henry Ford has impacted it.