Free Will, the ‘Block Universe’, and Eternalism

In this image, the light trail left by traffic illustrates an idea central to the growing block universe theory of time, that the past, present, and future coexist.  

By Keith Tidman

The block universe is already filled with every event that ever happens. It is where what are traditionally dubbed the past, present, and future exist simultaneously, not as classically flowing linearly from one to the other. As such, these three distinct aspects to time, which by definition exclude the notion of tense, are equally real. None is in any way advantaged over the others.

The orthodox model of a ‘block universe’ describes a four-dimensional universe, resembling a cube, which merges the three dimensions of space and one of time, along the lines that Albert Einstein theorised in his special relativity.

Might this tell us something about the possibility of free will in such a universe? Before we try to answer, let’s explore more particulars about the block universe itself.

 

If observed from outside, the block would appear to hold all of space and time. The spacetime coordinates of someone’s birth and death — and every occurrence bracketed in between — accordingly exist concurrently somewhere within the block. The occurrences are inalterably and forever in the block. This portrayal of foreverness is sometimes referred to as ‘eternalism’, defined as a complete history of all possible events.

 

Conventionally, the block is considered static. But maybe it’s not. What if, for example, what we ordinarily call ‘time’ is better called change? After all, the second law of thermodynamics tells us that the state of entropy of the entire universe — meaning the presence of disorder — will always result in a net increase. It never decreases. Until, that is, the universe ultimately ends. Demonstrating how change, as in the case of entropy, moves inexorably in one direction. The inevitability of such change has a special place for humankind, as reality transforms.

 

Entropy is thus consummate change, on a cosmic scale, which is how the illusion of something we call ‘the arrow of time’ manifests itself in our conscious minds. As such, change, not time, is what is truly fundamental in nature. Change defines our world. Which, in turn, means that what the block universe comprises is necessarily dynamical and fluid, rather than frozen and still. By extension, the block universe challenges the concept of eternalism.

 

This also means that cause and effect exist (as do correlation and effect) as fundamental features of a universe in which ‘becoming’, in the form of change, is rooted. Despite past, present, and future coexisting within the block universe, causes still necessarily precede and can never follow the effects of what appears as relentless change. Such change serves, in place of illusory time, as one axis matched up with three-dimensional space. The traditional picture of the block universe comprising nondynamical events would contradict the role of cause in making things happen.

 

So, let’s return to the issue of free will within the block universe.

 

First off, the block universe has typically been described as deterministic. That is, if every event within the universe happens simultaneously according to the precise space and time coordinates the model calls for, then everything has been inescapably preordained, or predetermined. It all just is. Free will in such a situation becomes every bit as much an illusion as time.

 

But there’s a caveat pushing back against that last point. In the absence of freewill, humans would resemble automatons. We would be contraption-like assemblages of parts that move but lack agency, and would be devoid of meaningful identity and true humanity. We, and events, could be seen as two-dimensional set pieces on a stage, deterministically scripted. With no stage direction or audience — and worse, no meaning. Some might proclaim that our sense of autonomy is yet another illusion, along with time. But I believe, given our species’ active role within this dynamical cosmos, that reality is otherwise.

 

Further, determinism would take us off the hook of accountability and consequences. Fate, bubbling up from the capriciousness of nature’s supposed mechanistic forces, would situate us in a world stripped of responsibility. A world in which our lives are pointlessly set to automatic. Where the distinction between good and evil becomes fuzzy. In this world, ethical norms are arbitrary and fickle — a mere stage prop, giving the appearance of consequences to actions.

 

And yet, the blueprint above replacing the concept of time with that of change puts free will back into play, allowing a universe in which our conscious minds freely make decisions and behave accordingly. Or, at least, seemingly so. In particular, for there to be events at the space-change coordinates of the block universe, there must be something capable of driving (causing) change. The events aren’t simply fated. That ‘something’ can only be choice associated with truly libertarian free will.

 

There’s one other aspect to free will that should be mentioned. Given that motion within the three-dimensional space of the block universe can occur, not only the what but also the where of events can be changed. Again, agency is required to freely choose. It’s like shuffling cards: the cards remain the same, but their ‘coordinates’ (location) change.

 

In refutation of determinism, the nature of change as described above allows that what decisions we make and actions we take within the block universe are expressions of libertarian free will. Our choices become new threads woven through the block universe’s fabric — threads that prove dissoluble, however, through the ceaselessness of change.

 

The Uncaused Multiverse: And What It Signifies

By Keith Tidman

Here’s an argument that seems like commonsense: everything that exists has a cause; the universe exists; and so, therefore, the universe has a cause. A related argument goes on to say that the events that led to the universe must themselves ultimately originate from an uncaused event, bringing the regress of causes to a halt.

But is such a model of cosmic creation right?

Cosmologists assert that our universe was created by the Big Bang, an origin story developed by the Belgian physicist and Catholic priest Georges Lemaitre in 1931. However, we ought not to confuse the so-called singularity — a tiny point of infinite density — and the follow-on Big Bang event with creation or causation per se, as if those events preceded the universe. Rather, they were early components of a universe that by then already existed, though in its infancy.

It’s often considered problematic to ask ‘what came before the Big Bang’, given the event is said to have led to the creation of space and time (I address ‘time’ in some detail below). By extension, the notion of nothingness prior to the Big Bang is equally problematic, because, correctly defined, nothingness is the total, absolute absence of everything — even energy and space. Although cosmologists claim that quantum fluctuations, or short bursts of energy in space, allowed the Big Bang to happen, we are surely then obliged to ask what allowed those fluctuations to happen.

Yet, it’s generally agreed you can’t get something from nothing. Which makes it all the more meaningful that by nothingness, we are not talking about space that happens to be empty, but rather the absence of space itself.

I therefore propose, instead, that there has always been something, an infinity where something is the default condition, corresponding to the impossibility of nothingness. Further, nothingness is inconceivable, in that we are incapable of visualising nothingness. As soon as we attempt to imagine nothingness, our minds — the act of thinking about it — causes the otherwise abstraction of ‘nothingness’ to turn into the concreteness of ‘something’: a thing with features. We can’t resist that outcome, for we have no basis in reality and in experience that we can match up with this absolute absence of everything, including space, no matter how hard we try to picture it in our mind’s eye.

The notion of infinity in this model of being excludes not just a ‘first universe’, but likewise excludes a ‘first cause’ or ‘prime mover’. By its very definition, infinity has no starting point: no point of origin; no uncaused cause. That’s key; nothing and no one turned on some metaphorical switch, to get the ball rolling.

What I wish to convey is a model of multiple universes existing — each living and dying — within an infinitely bigger whole, where infinity excludes a ‘first cause’ or ‘first universe’.

In this scenario, where something has always prevailed over nothingness, the topic of time inevitably raises its head, needing to be addressed. We cannot ignore it. But, I suggest, time appears problematic only because it's misconceived. Rather, time is not something that suddenly lurches out of the starting gate upon the occurrence of a Big Bang, in the manner that cosmologists and philosophers have typically described how it happens. Instead, when properly understood, time is best reflected in the unfolding of change.

The so-called ‘arrow of time’ traditionally appears to us in the three-way guise of the past leading to (causing) the present leading to the future. Allegorically, like a river. However, I propose that past and future are artificial constructs of the mind that simply give us a handy mechanism by which to live with the consequences of what we customarily call time: by that, meaning the consequences of change, and thus of causation. Accordingly, it is change through which time (temporal duration) is made visible to us; that is, the neurophysiological perception of change in human consciousness.

As such, only the present — a single, seamless ‘now’ — exists in context of our experience. To be sure, future and past give us a practical mental framework for modeling a world in ways that conveniently help us to make sense of it on an everyday level. Such as for hypothesising about what might be ahead and chronicling events for possible retrieval in the ‘now’. However, future and past are figments, of which we have to make the best. ‘Time reflected as change’ fits the cosmological model described here.

A process called ‘entropy’ lets us look at this time-as-change model on a cosmic scale. How? Well, entropy is the irresistible increase in net disorder — that is, evolving change — in a single universe. Despite spotty semblances of increased order in a universe — from the formation of new stars and galaxies to someone baking an apple pie — such localised instances of increased order are more than offset by the governing physical laws of thermodynamics.

These physical laws result in increasing net disorder, randomness, and uncertainty during the life cycle of a universe. That is, the arrow of change playing out as universes live and peter out because of heat death — or as a result of universes reversing their expansion and unwinding, erasing everything, only to rebound. Entropy, then, is really super-charged change running its course within each universe, giving us the impression of something we dub time.

I propose that in this cosmological model, the universe we inhabit is no more unique and alone than our solar system or beyond it our spiral galaxy, the Milky Way. The multiplicity of such things that we observe and readily accept within our universe arguably mirrors a similar multiplicity beyond our universe. These multiple universes may be regarded as occurring both in succession and in parallel, entailing variants of Big Bangs and entropy-driven ‘heat deaths’, within an infinitely larger whole of which they are a part.

In this multiverse reality of cosmic roiling, the likelihood of dissimilar natural laws from one universe to another, across the infinite many, matters as to each world’s developmental direction. For example, in both the science and philosophy of cosmology, the so-called ‘fine-tuning principle’ — known, too, as the anthropic principle — argues that with enough different universes, there’s a high probability some worlds will have natural laws and physical constants allowing for the kick-start and evolution of complex intelligent forms of life.

There’s one last consequence of the infinite, uncaused multiverse described here. Which is the absence of intent, and thus absence of intelligent design, when it comes to the physical laws and materialisation of sophisticated, conscious species pondering their home worlds. I propose that the fine-tuning of constants within these worlds does not undo the incidental nature of such reality.

The special appeal of this kind of multiverse is that it alone allows for the entirety of what can exist.

The Case of Hilbert’s Hotel and Infinity

In Hilbert’s infinite hotel, a room can always be found for newly arriving guests.

Posted by Keith Tidman

 

‘No vacancies. Rooms available’. That might as well be the contradictory sign outside the Hilbert Hotel of legend. Yet, is the sign really as nonsensical as it first seems?

 

The Hilbert Hotel paradox was made famous by the German mathematician David Hilbert in the 1920s. The paradox tells of an imaginary hotel with infinite rooms. All the rooms were occupied by an infinite number of guests.

 

However, a traveller wondered if a room might still be available, and approached the receptionist. The receptionist answered that the hotel could indeed accommodate him. To make the solution work, the receptionist asked all the current guests simply to move to the next room, making it possible to assign the new guest to Room 1.

 

This was a scalable maneuver, accommodating any number of new lodgers, whether a hundred, a hundred million, or far more. Because of the infinite rooms, importantly there was no last room; the receptionist could therefore keep moving the current guests to higher room numbers.

 

But the challenge was to get a bit harder. What showed up next was an infinitely large coach occupied by an infinite number of vacationers. To accommodate these guests, the receptionist shifted people so that only the infinite even-numbered rooms were occupied. 

 

Increasingly complex scenarios arose. Such as when an infinite number of coaches, each carrying infinite travellers, pulled into the hotel’s infinite parking lot. But we don’t need, for our purposes here, to delve into all the mathematical solutions. Suffice it to say that any number of new travellers could be lodged.

 

The larger significance of Hilbert’s thought experiment was that an ‘actual infinite’ is indeed logically consistent, even if on the surface it’s counterintuitive. As with Hilbert’s hotel, the infinite exists. Infinity’s logical consistency has further consequence, tying the thought experiment to the cosmological notion of an infinite past. 

 

That is, a beginningless reality. A reality in which our own universe, like infinite other universes, is one bounded part. An unlimited reality that extends even to the ‘far side’ of the Big Bang that gave rise to our universe almost fourteen billion years ago. A universe located within the continuum of the infinite. And a universe in which change gives us the illusion of time’s passage.

 

A common argument in cosmology (origins) is that the string of causes must start with the Big Bang. Or, rooted in a theological origin story, that it must start with a noncontingent divine creator, or so-called ‘first cause’. The claim of such arguments is that reality doesn’t reach back indefinitely into the past, but has a starting point.

 

‘Our minds are finite, and yet even in these circumstances of finitude,

we are surrounded by possibilities that are infinite’.

Alfred North Whitehead, philosopher and mathematician

 There are no grounds, however, to believe that our universe, with its time-stamped beginning (the Big Bang) and its one-way life-cycle toward net disorder, is the entirety of existence. Rather, an infinite history before the Big Bang, or beginningless reality, does make sense. As does the other bookend to that reality, an endless future, where infinity describes both before and after the fleetingly present moment, or what we might think of as the ‘now’. Nothing rules out or contradicts that unlimited scope of reality.

 

With an unchangeable beginningless reality, there is no need to evoke the concept of ‘something coming into being from nothing’; there is no need to interrupt the different laws of physics, or of time, governing each universe’s own separate reality; there is no time zero or insupportable moment of all creation. It’s infinity ‘all the way down’, to paraphrase British philosopher Bertrand Russell’s whimsical reference to infinite regress.  

 

We ought to avoid conflating the emergence of things within our bounded universe (like the making of new galaxies, of which there is a finite number) with the emergence of things within the infinite (like the formation of new universes, of which there is an infinite variety, each with its unique properties, life cycle, and natural laws).

 

‘No other question [than the infinite] has ever moved so profoundly the spirit of man; no other idea has so fruitfully stimulated his intellect’, declared David Hilbert. Our bounded universe is simply one part of that infinite, that is, part of beginningless reality. Our universe existing among infinite others, like the infinite rooms in Hilbert’s hotel.

Picture Post #66 What a Can Can Do

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'Because things don’t appear to be the known thing; they aren’t what they seemed to be

neither will they become what they might appear to become.'

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Posted by Tessa den Uyl

Malaga, Spain  2021

Unlike randomly dropped trash, this Coca Cola can seems to have been placed in cardinal Ángel Herrera Oria's hand very carefully. Tiny gestures, what thoughts do they provoke? The photo seems to conjure up three phases in time:

• Materially, the alloy metal of the bronze statue and the aluminium can link together. The originally clay molded figure reveals striped structures on the cloak of the statue—and somehow striped movements are very human gestures indeed. These connect to the stripes of the bar code on the industrial can.  

• The deformed horizontally placed can offers more dynamism to the inclined direction of the Cardinal’s hand. The sky, a stone church in the background, the bronze statue, the can and the bar code together offer a kind of idea about a tangible timeline. So far, we can follow it.

• But lately, when thinking of algorithms, or something like crypto currencies, digital data creates ‘new images’ which are mostly only comprehensible to programmers, and for a vast majority of people remain invisible. No tiny tangible innocent gestures can interfere there, and perhaps we’ve come to the time in which: what a can, cannot do…

A Sense of Time

A piece of artwork Melissa Taylor says that she made using newspaper and 
charcoal, when inspired by the song ‘Time’ by Pink Floyd

Posted by Andrew Porter* 

Plato calls time the ‘moving image of eternity’. Most likely because time and eternity are all tied up together or because time and eternity are a dialectic, yet concurrently an organic whole.

Perhaps that esoteric word ‘eternity’ means exactly this: the melding of ‘time’ and ‘timelessness’ – a covenant, as it were, to let freedom/order live, to let rationality have process and identity, to let life have its optimal day, to sustain a universe that is true to the good and the beautiful.

Actual time, meaning time in the full sense, is local mixed with non-local, only seeming simply local. This non-locality that is very much a part of time is like non-locality and entanglement in quantum physics. Space-time reveals that distance and no-distance are both true. Time is not change, as such. It is constancy as much as change, identity as much as process. And the best way to express this is to say that actual time is a thorough union of the concepts of ‘time’ and ‘timelessness’.

In this view, God would be time/timelessness, or some less awkward term, such as ‘time-full-ness’. No wait, that's still awkward. God would not see all time as a single view, frozen and fixed, but would, as it were, take something else seriously: the thorough integration of ‘time’ aspects and ones of ‘timelessness’—to create an attainment in accord with His values. The Divine may be or see neither time as discrete moments in sequence nor timelessness described as an atemporal block.

One of the biggest conundrums in thought has been the relationship or presumed relationship between time and timelessness. Scientists, theologians, philosophers, and perhaps your next-door neighbour wrestle with the complexities therein. It seems to be relevant to today's world as people try to sort out a balance between doing and being, between stress or contentment. Are they gripped by time or actually freed from it?

The philosophical issue closely relates to what we consider, if anything, Becoming and Being. We tend to like these categories because we think it makes things clear. But our real problem is likely that we assume what ‘time’ and ‘timelessness’ are – and then run off in the wrong direction.
Timelessness seems to have the advantage of being free from plodding pace as a chain of moments, but what could timelessness be without the duration and dovetailing of one phase with another?

Time is physicality; this is a claim that can be clearly made. But we have too many presumptions about timelessness. Current thinking tends to relegate the 'timeless' to a ‘block universe’. If it can’t move it must be a frozen reality and a view, say, by God that sees the big whole all at once. I think this block universe—an atemporality ‘fixed’ as much as space is, and relative one ‘place’ to another, is an untenable view. It only arises as a counterpoint to what we experience as time-passage.

The core of the, I think, wrongheaded, distinction is that temporal and atemporal seem to compete, to diverge, be some kind of opposite. But this is what I encourage us to reconsider. Nature actually shows a contrary impetus: not a separation of time and timelessness, but a convergence. We see clues that nature appears determined to be a composition, of what would otherwise be a non-unity; that is, a consolidation of time's openness and newness, of timelessness' freedom from measure as movement.

All reality—physicality, laws, energy, dark matter, spiritual reality—gives strong indications that it, rather than a bifurcation, is an amalgam, a mix, of what are only conceptually time-as-sequence and timelessness as a vision of the entirety. A further argument would point out that reality is the way it is precisely because it is a threading of the needle between ‘time’ and ‘timelessness’. The emergence of the Lesser Grass Blue butterfly in Hawaii is a fact that supports the idea that there is a synthesis of continuity and newness, a kind of absolute blend of becoming and being, process and consistent identity. The species is replete with aspects that require time; in one and the same species, there is an equal requirement for a flexibility of action across time, or regardless of time.

This melding of what would otherwise be ‘time’ and ‘timelessness’ (a singularity which everything is) both frees you and orders. You are neither wholly beholden to time as change nor locked in a space–time block that shatters choice in the moment. You are, rather, free to make decisions in an open present, and ordered to optimise those choices or ways of life by the transcendence of time that is inherent in real, actual existence. With a newfound time sense, we can be more in the swing of things. 

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Andrew Porter is a philosopher and educator who lives near Boston in the United States.
He can be contacted via email at <aporter344@gmail.com>

Is Time What It Appears to Be?

Posted by Keith Tidman

Picture credit: Shutterstock via https://www.livescience.com/

“Time itself flows in constant motion, just like a river; for neither the river nor the swift hour can stop its course; but, as wave is pushed on by wave, and as each wave as it comes is both pressed on and itself presses the wave in front, so time both flees and follows and is ever new.” – Ovid

We understand time both metaphorically and poetically as a flowing river — a sequence of discrete but fleeting moments — coursing linearly from an onrushing future to a tangible present to an accumulating past. Yet, might ‘time’ be different than that?

Our instincts embrace this model of flowing time as reality. The metaphor extends to suppose a unidirectional flow, or an ‘arrow of time’. According to this, a rock flies through a window, shattering the glass; the splinters of glass never reform into a whole window. The model serves as a handy approximation for our everyday experiences. Yet what if the metaphor of time as a flowing river does not reflect reality? What then might be an alternative model of time?

What if, rather than the notion of flow, time actually entails only one now. Here, an important distinction must be made, for clarity. That is, time is not a sequence of ‘nows’, as proposed by some, such as the British author of alternative physics, Julian Barbour. That is, time is not points of time — corresponding to frames in a movie reel — with events and experiences following one another as ephemeral moments that if slowed down can be distinguished from one another. But, rather, time entails just one now. A model of time in which the future is an illusion — it doesn’t exist. The future isn’t a predetermined block of about-to-occur happenings or about-to-exist things. Likewise, the past is an illusion — it doesn’t exist. 

As to the past not existing, let me be specific. The point is that what we label as history, cosmology, anthropology, archaeology, evolution, and the like do not compose a separately distinguishable past. Rather, they are chronicles — memories, knowledge, understanding, awareness, information, insight, evidence — that exist only as seamless components of now. The Battle of Hastings did not add to an accumulating past as such; all that we know and have chronicled about the battle exists only in the now. ‘Now’ is the entirety of what exists — all things and all happenings: absent a future and past, absent a beginning and end. As the 4th-century philosopher St. Augustine of Hippo presciently noted:

‘There are three times: a present time about things past, a present time about things present, a present time about things future. The future exists only as expectations, the past exists only as memory, but expectation and memory exist in the present’.

In this construct, what we experience is not the flow of time — not temporal duration, as we are want to envision — but change. All the diverse things and events that compose reality undergo change. Individual things change, as does the bigger landscape of which they are a part and to which they are bound. Critically, without change, we would not experience the illusion of time. And without things and events, we would not perceive change. Indeed, as Ernst Mach, the Austrian philosopher-physicist, pointed out: ‘... time is an abstraction, at which we arrive by means of the changes of things’.

It is change, therefore, that renders the apparition of ‘time’ visible to us — that is, change tricks the mind, making time seem real rather than the illusion it is. The illusion of time nonetheless remains helpful in our everyday lives — brown leaves drop from trees in autumn, we commute to work sipping our coffee, an apple rots under a tree, the embers of a campfire cool down, the newspaper is daily delivered to our front door, a lion chases down a gazelle, an orchestra performs Chopin to rapt audience members, and so forth. These kinds of experiences provide grounds for the illusion of time to exist rather than not to exist.

As Aristotle succinctly put it: ‘there is no time apart from change’. Yet, that said, change is not time. Change and time are often conflated, where change is commonly used as a measurement of the presumed passage (flow) of time. As such, change is more real to the illusion of time’s passing than is our observing the hands of a clock rotate. The movement of a clock’s hands simply marks off arbitrarily conventional units of something we call time; however, the hands’ rotation doesn’t tell us anything about the fundamental nature of time. Change leads to the orthodox illusion of time: a distinctly separate future, present, and past morphing from one to the other. Aristotle professed regarding this measurement aspect of time’s illusion:

‘Whether if soul [mind] did not exist, time would exist or not, is a question that may be asked; for if there cannot be someone to count, there cannot be anything that can be counted.’

So it is change — or more precisely, the neurophysiological perception of change in human consciousness — that deludes us into believing in time as a flowing river: a discrete future flowing into a discrete present flowing into a discrete past. The one-way arrow of time.

In this way, the expression of dynamic change provides our everyday illusion of time, flowing inexorably and eternally, as if to flow over us. The British idealist philosopher J.M.E. McTaggart wrote in the early years of the twentieth century that ‘in all ages the belief in the unreality of time has proved singularly attractive’. He underscored the point:

‘I believe that nothing that exists can be temporal, and that therefore time is unreal.’

To conclude, then: Although the intuitive illusion of time, passing from the future to the present to the past, serves as a convenient construct in our everyday lives at work, at home, and at play, in reality this model of time and its flow is a fiction. Actual experience exists only as a single, seamless ‘now’; there is no separately discrete future or past. Our sense of time’s allegorical flow — indeed, of time itself — arises from the occurrence of ‘change’ in things and events – and is ultimately an illusion.