Humming along….

The human brain is able to store and retrieve memories spanning the decades of an individual life. This occurs despite the exchange, death and constant rearrangement of our neurons. Which raises the question of how? In the hard drives of modern computers – classical or quantum – data is stored in physical bytes (or qubits). Data is written to them and retrieved from them. They can be re-written but the bits themselves do not otherwise change. If one does change through damage or failure, that bit of information is – generally speaking and leaving aside backups – lost. Computer memory is hard. Ours is soft, organic. Amidst the constant comings and goings of millions of nerve cells, our memories – our very identity and sense of self – remains constant (within the margins of error associated with life and aging). It’s a marvel of evolution, really.

According to a recent study, we owe this happy state of affairs to the fact that “as individual neurons die, our neural networks readjust, fine-tuning their connections to sustain optimal data transmission.” It’s a matter of individual nerve cells and networks of same being both excited and inhibited from discharging, thus maintaining a dynamic balance. Through this process, the entire system (networks of networks) achieves “criticality’ – sustaining an overall state that apparently maintains the data structure despite changes affecting the underlying organic bits. What this means is something like this: our inbuilt self-regulating rhythm of neural activity at the individual nerve, synapse and network levels tends towards an optimal level of brain-wide activity. That allows us to remember stuff even as nerve connections change. It’s like the brain is constantly humming to itself the story of our lives. The humming is the basis of mind and memory.

While one might take the notion of this “humming” as simply a metaphor, the researchers suggest that the mechanism they hypothesize also may explain consciousness. But it seems to me this cannot be the case. Ever listen to a gurgling stream? It kinda hums too. But a stream – okay, as far as we know – is not conscious. But we are. I hum therefore I am.

Interlude: Unconscious Artificial Intelligence?

I’ve been considering the nature and role of consciousness for some years. Along the way, I’ve wondered about Artificial Intelligence (AI) and whether at some point it might become conscious. My conclusion has been that however complex and “intelligent” an AI would become, that would not produce consciousness. Consciousness requires life and – as at must include at least some degree of self-awareness – it could only be the property of an individual organism with some organized “self.” Machine intelligence might be constructed – coded – to simulate self (and thus pass the Turing Test) but this would nevertheless not be an awareness of self. (Even now, AIs and robots can be quite “clever.” A recent visitor to a Tokyo hotel asked the robot concierge how much it cost. It replied “I’m priceless.” Cute.) However elaborate the mind – in the case of the most advanced AI’s built with neural networks this might be quite sophisticated, even to the point that the human programmers might not be able to replicate its internal processes – consciousness is an additional property beyond mere complexity and processing power. In the first season of HBO’s Westworld, android “hosts” become conscious through the repeated experience of pain and loss. But of course, to feel such emotions, one must first experience them as such. Quantity (of coded processing operations) does not equal qualia. Qualitative experiences are only possible if one is already conscious.

But human beings not only possess a conscious mind but also an unconscious one. Most brain processes – even those that at some point enter consciousness – originate and work away unconsciously. We all have the experience of dreaming and also of doing things quite competently, without any awareness of having done them. (We may, for example, drive a familiar daily route and get to our destination without remembering details of the ride.) The brain processing of the unconscious mind may indeed be replicated by advanced machine intelligence. As AI becomes more complex, given the power of electronic circuits and the complexity of coded learning via neutral networks, the processing capacity of machine intelligence may well exceed human despite not becoming conscious. They would also, perhaps, exceed human ability to understand what they are “thinking” (or even “dreaming”). It was Stephen Hawking who most famously warned of the dangers of such AIs. He warned that we need to be attentive to their management.

So, though AIs may never become conscious or self-aware, they may nevertheless run autonomously along routes enabled by the algorithms coded into their machine DNA and come to “conclusions” we humans might find inconvenient or dangerous. (They might for example decide that human activity is injurious to the planet – which it seems it is – and seek to correct the disease.) Limits should be included in the most basic AI coding and algorithms. Isaac Asimov thought of this some time ago. His Three Laws of Robotics make a good start:

First Law – A robot may not injure a human being or, through inaction, allow a human being to come to harm.

Second Law – A robot must obey the orders given it by human beings except where such orders would conflict with the First Law.

Third Law – A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.

To these he later added a zeroith law: A robot may not harm humanity, or, by inaction, allow humanity to come to harm.

This last might be might turn out to be a doubled-edged sword.

Next week I will return to  Notes on "A History of Political Theory"

Intelligence or Bust?

Jennifer Ackerman makes a convincing case for bird intelligence in her 2016 The Genius of Birds. Birds use tools, sing, live socially, navigate over long distances and have at least the rudiments of mind. The most intelligent have larger and more complexly organized brains. In her last chapter, Sparrowville: Adaptive Genius, she suggests that birds that have mastered living in human environments – house sparrows, members of the crow and pigeon families and others – have prospered because of their flexibility and intelligence. She speculates that “we humans, in creating novel and unstable environments, are changing the very nature of the bird family tree” by creating evolutionary pressures for species characterized by increased intelligence. Writ large, she wonders, is whether the changes being wrought by humans in all the areas we affect – from city environments, to deforestation, to climate change – favor the development of intelligence in species that manage to survive.

It is interesting to consider whether the new Anthropocene epoch that we seem to have entered will be one of those catastrophic periods of destruction that sweep away species that cannot adapt quickly enough to the pace and degree of change. Among those species that do adapt and even prosper, the key for many may be the development of greater intelligence. Some species may find other ways to survive, but many will go extinct. Intelligence (in the form of operational flexibility and adaptability) or bust may be the motif of the next centuries, including for human societies. And of course, it is not yet clear that intelligence itself is adaptive in the long term. We may be in the process of changing the world we live in faster than even we can accommodate.

The Brain As Quantum Computer

Recently I had the opportunity to watch southern African White-necked crows while they were watching me. I was taking afternoon tea (and eating rusks) on the patio overlooking a beautiful valley in the hills near Mbabane. Crows are smart and these are among the smartest. One sat on the roof of the next house staring at me convinced that at some point, I would grow careless and give him or her a chance to steal something, perhaps something to eat. As I was ever-vigilant, eventually they flew off over the valley, soaring and dipping in very real time. As I watched, I thought about the complex calculations that a bird must make moment-to-moment to move so quickly through three-dimensional space. They must keep track of where they are, where to go, how to get there. Knowing each requires entire subsets of information – such as (for where to go), where they saw food or last saw food or might find food while watching for anything that might require evasive action. These calculations must be solved each fraction of a second. I then thought this must be true for any animal with a brain (or nervous system). Neural systems allow the organism to move through, and react to, the environment rather than obey simple tropisms or merely be buffeted about by the external environment. The more complicated the neural system – reaching a peak of networks of networks to the 4th or 5th power (or beyond) running in our human brains – the more complex the information that can be stored and manipulated. A classical view of the human brain would start with the 500 trillion synapses of the adult brain’s hundred billion neurons. Now that is a lot of synapses. But think about how much information is stored there in language, knowledge, experience, memories and everything else that makes each individual unique and utterly complex.

I’ve speculated in this space about quantum consciousness, the production of mind from brain through “collapsing the wave functions apprehended from the perceptual flow. While watching the crows, I realized that the brain must function as a quantum computer and not as a classical system. The notion that quantum processes mix with (or form) consciousness is called “orchestrated objective reduction.” It rests on the possibility that the microtubules in nerve cells are small enough to contain quantum states. The brain accounts for just two percent of the human body’s mass but utilizes around 20% of its energy. It basically is like having a 20 watt bulb in our head shining all the time. This energy could be powering the creation and persistence of entangled states inside the microtubules of every cell. In this way, the neural organization of the brain would be the maintenance of a complex, constantly refreshed, while constantly changing, global entangled state. The collapse of the highest level of this entangled state-of-states coincides with consciousness. Inside our heads, this quantum computer has storage and calculating power well beyond what would be true if our brains functioned simply along classical physics lines. It may produce what we experience as consciousness. Or, collapse may come through the decisions that we – the “ghost” in the machine, acting as the internal observer – make in each moment as the crow flies.

Deep Time: Take Two

It's hard to fully comprehend the depth of time past. The universe came into existence some 13.8 billion years ago (BYA). The earth was formed around 4.5 BYA. The first signs of life – simple microbes – appear about 3.5 BYA. But as presented in a wonderful book about just how complex and essential they are – Life's Engines: How Microbes Made Earth Habitable by Paul Falkowski – microbes are anything but simple. Microbes – bacteria and archaea – are prokaryotes, single cell life without a nucleus or organelles. Everything else – single cell or multi-cell plants and animals – are eukaryotes: cells containing a nucleus and organelles such as mitochondria. The prokaryotes developed the ability to extract energy from the chemical environment and, eventually, from the sun. It took another two billion years for them to evolve into complex cells: the eukaryotes.

Two billion years is a long time. Why did it take that long to go from bacteria and archaea to the first eukaryotes? The machinery to convert chemicals such as hydrogen sulfide or ammonia, and then the much harder task of using sunlight, to fuel life would have taken a long time to develop. But not just that. Extracting energy from the environment meant a complex process of freeing electrons from chemical bonds, transferring those electrons around within the cell and using them ultimately to create other chemicals that would store those electrons (i.e., serve as “food”) to provide energy for cellular processes. Photosynthesis is an even more complex process that uses sunlight to crack electrons from water and combine them – through intermediate steps – with carbon dioxide to produce carbohydrates and, as a waste product, oxygen. This complex machinery had to evolve step by step through the repeated random changes in DNA and RNA as winnowed through natural selection. (A good part of the first billion years after the formation of earth would have been used for the construction of the RNA/DNA mechanism itself.) As Falkowski argues, the processes for producing and consuming biologic energy work as tightly as a complex and precise system of interlocking gears: one out of place and the whole won't work. All the parts of the machinery had to come on line more or less at once or it would not function. Somehow, the machinery evolved anyway, implying that a lot of time was required for vastly more failures – in which the resulting organism from random mutation simply died – than successes.

That the machinery was there to be evolved – that the givens of the universe allowed such a thing to come into existence – is also worth pondering. As is the fact that we would not be here otherwise.

Why Aren't We Hearing Anyone Else?

Read an article recently on the Great Filter, the notion that we may not come across any evidence of advanced civilizations beyond our own because something eventually rubs them out.  We have been sending out electro-magnetic signals for over a hundred years and have been listening for almost as long.  We have by now discovered almost 1800 exoplanets. An estimated 22% of sun-like stars in our galaxy may have earth-like planets orbiting in their habitable zones.  That would mean 20 billion candidates for life such as ours. Four of such earth-like exoplanets planets have been identified within 50 light years of us, another two within 500 LYs.

There is no reason to assume that life would have to be similar to our carbon-based form or would require conditions similar to ours.  Life on our planet sprung up quickly and the physics and chemistry of our universe seem to favor self-organizing processes.  Life forms could be quite varied and perhaps universal.

Enrico Fermi suggested in 1950 that if any advanced civilization developed the ability to travel beyond its solar system, even at less than light speed, in ten million years it should be able to colonize the whole Milky Way (100,000 LYs in diameter).  So why don't we see them?  Why haven't we even heard anyone else?  The Great Filter suggests various possibilities.

The first would be that advanced life is rare.  The conditions for it to develop are quite special. While life on earth arose quickly, in just 400 million years after earth formed a solid crust, it took another almost two billion years for complex single cells to evolve.  Add another billion years – about 550 million years ago – for multi-cellular creatures.  Most of the history of life on earth is this long prelude to the development of us.  Humans arose only in the last two million years of the earth's 4,500 million years.  Along the way, life went through several mass extinction events.  The last one, 65 million years ago, took out the dinosaurs leaving the ground clear for the development of mammals.  The combination of events and circumstances that led to us may be so rare as to make us one of the very few – or only – lucky ones.

But with some probable 20 billion earth-like exoplanets and some 100 billion likely planets in all, chances are that however rare, odds would favor the development of a considerable number of advanced life forms in our galaxy.  Some might have arose millions of years ago.  Any signals they sent would have had plenty of time to reach us.  Any earth-like planet with advanced life within 500 LYs would presumably have been heard by now.  So far, the SETI project has found none.

Perhaps our listening capabilities are still not sensitive enough to pick up any signals.  But clearly we are now able to tease out the existence of exoplanets themselves out some two thousand light years.

Maybe cosmic natural disasters – nearby super-novas, meteor strikes, etc – occur frequently enough to set back life and knock out civilizations before they can get very far?  But we've gone 65 million years without one and there is no reason to expect any such for at least the next few hundred years.

Maybe someone is out there, able to hide themselves and/or tracking down and destroying any potential competitors before they get too far?  This is a common science fiction trope.   But it assumes that advanced civilizations would either be very modest – and thus hide themselves, perhaps quietly visiting and making crop circles or waiting for us to rise to the level where we could join their Federation – or especially vicious and aggressive.  Based upon the only advanced civilization we know of – ourselves – one could not rule out the second possibility.

Finally, there is the possibility that there is something about advanced technologies that operates to cut short the civilization that develops them: industrial civilization leading to run-away climate change; biotechnology leading to – or failing to keep up with – disruptions in the present web of life; failure of critical management systems to handle increasingly complex and changing political, social, economic and ecological dynamics.

Bottom line, so far we have no evidence that we have company anywhere out there. We may be special. Question is, are we doomed to be filtered out and will we have ourselves to blame?

Life as Striving Towards Self-awareness

The remake of Cosmos began airing last night. Featured a presentation of the time since the Big Bang scaled as a year-long calendar starting January 1 at 13.8 billion years ago (bya) and ending in the last few seconds of December 31 corresponding to the entire time of human recorded history. Been thinking about this immensity of time focusing on recent news of the earliest piece found of the earth’s crust and of the earliest signs of life.

The earth was formed some 4.5 bya. The moon was formed in a colossal collision between earth and a Mars-sized planet some 4.45 bya. That oldest piece of crust – a zircon – has been dated to 4.4 bya. It took some 50 million years after the collision for the earth to cool down enough to have a solid surface. But the earth was still in for further impacts during the Late Heavy Bombardment that lasted until around 3.9 bya. The first signs of life – monocellular bacteria and archaea – appear around 3.5 bya. But it takes almost another two billion years for complex single cell life – the first eukaryotes, cells with nuclei and DNA – to appear. Sexual reproduction follows at about 1.2 bya and the first multicellular life at 1.0 bya. The first fossils of multicellular animals date to around 550 million years ago (mya), fish to 500 mya, land plants to 475 mya, insects to 400 mya, reptiles to 300 mya, mammals to 200 mya and primates to 60 million. Humans are some 2 million years old.

Life was quick to emerge once the earth had a solid surface. It took only 400 million years for inert chemicals interacting somewhere on that surface to become life. To us, that is a long time. But given the leap from non-living to living, maybe not so much. During those 400 million years, the laws of physics and chemistry plus the raw conditions of earth and water somehow gradually led to small clumps of matter coming and staying together and reproducing themselves. The first such clumps that successfully kept out the environment, organized themselves internally and made copies of themselves may have been something like viruses. At what point they crossed from non-living examples of complex chemistry to living things is unknown. But it took another two billion years for those clumps to become the most simple form of single cell life we know and then another billion years years or so to become the simplest form of multicellular life.

Four hundred million years for life to get started, two thousand million to reach the level of bacteria, another one thousand million to reach jellyfish and then fish in 50 million years, plants on land in 25 million, 75 million more for land animals (insects). Some 170 million after the first land animals takes us to dinosaurs and then — clearing the board — their extinction 65 mya. In a blink of an eye, at 60 mya, the first primates appear and then in the past 200,000 years homo sapiens.

Life started quickly but took a long time to build the tool box for evolution by sexual reproduction. It then took off leading to complex life within a comparatively short time and exploded in the last 500 million years. What about the universe might account for the easy start to life, the steady progress of evolution and the relatively fast emergence of higher forms of life and ultimately human awareness?

With the confirmation of the Higgs field, it now seems that the universe beginning with the Big Bang had its properties imprinted from the start. The laws and constants of physics and chemistry seem to conspire to produce the material universe of which we find ourselves part. Atoms emerge from a primordial soup of particles, combine in stellar processes to form elements and eventually become planets. Stars themselves combine the simplest elements in such a way as to provide copious amounts of free energy. The Kepler program has confirmed that planets are common and most stars have them. Put together a planet like the early earth – and there probably are millions of them in our galaxy alone – and wait 400 million years or so and life may emerge. Given a degree of long term stability, it may become self-aware.

I've speculated here that consciousness is itself a property of the universe and may well be prior to it. But how might it be connected to life? What is “life” and how did it emerge from chemistry and physics? Suppose that consciousness pervades matter and the universe and drives – through the laws of physics – increasing levels of complexity beginning with atoms toward sufficiently elaborated organizations of matter to enable mind and thereby self-awareness. Life becomes a form of striving, a movement of consciousness toward a clumping of matter sufficiently complex to provide it with the biological substrate for perception and thought. Life is the process of individual striving within and against its environment. At various levels, we call this process physics, chemistry or biology. Within biology, it manifests as evolution. But it might be seen as “God thinking.” Hegel anyone?

Plants and the Sun

There's a fascinating article in the New Yorker on The Intelligent Plant.  It looks at the current debate among plant scientists over whether plants are intelligent or might be said to behave intelligently.  Plants do seem to interact with their environment in a way that appears directed and can often be quite complex.  But what caught my eye was the statement by one scientist to the effect that one does not have to ascribe intelligence to plants just to make them sound special as it's enough simply to note that they "eat sunlight."

We all learn about photosynthesis in school.  How sunlight is converted to free electrons within plant chloroplasts and made available to make carbohydrates from air and soil.  This is indeed wonderful enough.  But the notion that what plants are doing can be simply described as eating sunlight brings to the fore just how miraculous a process this really is.  Plants eat sunlight and we animals can then eat them and those that eat them for us.  Through the intermediation of plants, we too eat sunlight.  And it's free.

On a recent warm, sunny winter solstice day, sitting outside smoking a cigar, I looked anew at how this system works.  The universe is constructed in just such a way as to allow complex physics and chemistry to evolve giant balls of gas that release tremendous fountains of energy -- we call these stars, like our sun -- free to be consumed by stationary processing plants -- that we indeed call plants -- to also feed mobile creatures that may eventually achieve individual consciousness. 

Pretty cool.

Moments in Time and Consciousness

Attended the symphony today.  Instrumental music does not hold my attention as well as a play -- especially Shakespeare -- would.  I enjoyed the program but without words (lyrics), it didn't pin down my thoughts.  So they just wandered.

I wondered about exactly why I could not focus on the assembly of notes as I would on an assembly of words.  That made me think about just how these notes add up to music anyway.  The basic length of time in a conscious moment must be long enough for a series of notes to be assembled in the mind into a bit of music.  If we only perceived note by note -- or word by word for that matter -- we'd never make sense of anything.  The basic unit of conscious perception apparently is 2-3 seconds. Our now is this long.  Short term memory -- what is held in consciousness readily available as context for each moment -- is some 10-15 seconds.  We can perceive a much denser reality in each moment than simply one "thing."  Events can enter our consciousness that linger only some 40 milliseconds.  Indeed, each note is made up from a number of vibrations in the air and a symphony has lots of instruments making each note.  So each conscious moment is a highly sampled chunk of passing time.  The point is, however, not this but the apparent fact that our consciousness grasps this moment in its entirety.  It spans the stream of quantized time.  (The smallest unit of time is the Planck time, 5.39x10 to the -44th seconds.)  Consciousness seems to exist outside the flow of time.  We do not observe, think, exist in time but somehow alongside it.  The "ghost" in our machine provides a stage large enough for an assembly of actors to play their parts so that we can experience each moment of the world.

Deep Time

Went walking today through the nearby woods. As I've been watching a Nova series on the evolution of life as shown in Australia, I started thinking about deep time. Actually, I started thinking about trees and green plants, as I was surrounded by them. And about an image from that TV show showing what the first land plants must have looked like 475 million years ago. The were like simple, tiny mosses and lichens. In the time since, they've become all the plants we see today. 

Reconstruction of Cooksonia

The earth – and solar system – are some 4.6 billion years old. The age of the universe, according to the latest information from the Planck satellite, is around 13.8 billion. The most simple forms of life on earth go back at least 2 billion years. The Ginko tree is 200 million years old. What do these numbers mean to us? We have become used to reading about hundreds of billions and even trillions of dollars so we feel comfortable, perhaps, with thinking of just a few billion here and there. But look at a forest and think about the time it took to make it what we see. Read anything about the latest discoveries of our DNA and how the supposedly “junk” part actually helps orchestrate a vast and complex dance of proteins that make us what we are. Or about the complexity of the human brain, only a million or so years old. How long did it take from the first stirrings of life – tiny bits even without cell walls – to everything alive we see? Each change taking countless generations of random mutation and natural selection. Stare down that long hallway home and that is deep time.

Go further back to that Big Bang of 13.8 billion years ago. At the first moment, everything was the same burst of energy. Light didn't escape into space for over 300,000 years. But within the tiniest part of one second, the Higgs Field manifested and gave form to the elementary particles of the universe. Over the next billions of years, the energy and matter of the universe cooled and condensed into atoms, molecules, stars, galaxies and us. If we define life as that which exists and changes, the universe has been alive since the beginning, evolving complexity and becoming so many things. Look down that hallway, to the light at the bedroom door and that is deep time.

A Riff on Modern Capitalism

During most of human evolution, we lived by hunting and gathering.  Our daily activities were focused almost entirely on getting enough food to survive today and tomorrow.  Around 10 thousand years ago, we started replacing hunting and gathering with agriculture and animal husbandry.  Along the way, we no doubt began engaging in trading and bartering.  But the pursuit of today's bread and meat remained the central part of our daily existence.  By now, in industrial and post-industrial society, the actual production of food has become an activity which most people in developed - and increasingly in developing -  societies do not directly participate.  Instead, we earn our daily bread - and much else we now find essential for "modern life" - through buying and selling, earning and spending.

Production is now just one small part of the process of sustaining human life and society in the modern world.  People must buy and must be encouraged to buy.  Advertising is essential in this process so we get bombarded constantly with it.  All of life can seem built around being incessantly offered opportunities to spend our money.  If people stop buying - perhaps because they cannot earn - then selling becomes difficult, production may falter and more people end up not earning.

As production becomes more remote from the actual consumption processes - buying/selling, earning/spending - that feed us, space has grown for some to profit mightily from satisfying and creating needs.  This is not always bad.  The Internet and iDevices vastly open space for human interaction and productivity.  But the space for profit has become quite big and indeed can be thought of as a kind of petri dish for growth of a "tumor" - the mythical "job creator" - in the middle of the human enterprise.

The problem is how to even conceptualize a way of organizing our society around some other way of life.  We can't really all return to hunting and gathering.  Making and trading also cannot sustain our seven billion.  For each according to his needs and from each according to her ability would rely even more on an "invisible hand" than our current capitalist system as no mere human hand could sort out all our needs and capabilities. 

For now there seems no good answer other than trying to reduce the size of the tumor.

The Role of Chaos in Human Evolution

Two terms need immediate clarification. The chaos I am referring to is the deterministic yet unpredictable kind. And I take human evolution to include that change accruing from cultural, social, political and technological processes as well at the slower progression through genetic natural selection.

The conception of natural selection as a form of progression flies in the face of the current politically correct tendency to question the notion that life is evolving toward anything. But the constantly increasing complexity resulting from chaotic processes applied to existing complexity has clearly driven an ever increasing individuation of life since its start a few billion years ago. Natural selection feeds on the random and unpredictable variation characteristic of all life - indeed of all material existence - and results in this progression from lessor to greater complexity.

Down to quantum level, all material processes occur according to deterministic laws even when the outcomes so generated are statistical probabilities. And as interactions between matter and energy become more complex according to these laws of nature – we live in the kind of universe that they do – the processes also become more chaotic. The result is that as complexity increases, it begets greater complexity. And whereas one stone is pretty much like any other stone, every single live organism is a unique individual. And the process of each individual organism interacting with its environment – also always changing – results in achieving various degrees of fitness. The important points here seem to me to be two: that it is individual differences that determine fitness and fuel evolution and that the more individualized the organism, the greater the possible points for chaos to operate.

A human being is a marvelously unique and individualized organism. We vary at almost every interesting point from all other humans. Our cultural and social variability adds extra dimensions to our individuation. Our accelerating technology allows ways of interacting beyond calculation and is a true chaos multiplier. The human race is by this point of time a realm of complexity that the earth has never seen before. Evolution from this basis promises to take us places that we cannot now imagine, if we survive at all.

Thus, everything that we do – to test our boundaries, to right the world’s wrongs, to struggle for our daily bread – and the way that we do it provides the raw material for evolution, for greater complexity. We drive change when we seek to effect our environment in our own way, even though we do not always succeed. In the chaotic processes of life, some win and more lose. (As Crash Davis put it: some days you win, some days you lose and some days it rains.) And in the end, it is not about us but about the fact that our species will survive only if there are enough folks pressing forward even when most of our individual efforts seem to fall short.