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.

And the Universe Shrugged

Posted by Keith Tidman

It’s not a question of whether humankind will become extinct, but when.

To be clear, I’m not talking about a devastatingly runaway climate; the predations of human beings on ecosystems; an asteroid slamming into Earth; a super-volcano erupting; a thermonuclear conflagration; a global contagion; rogue artificial intelligence; an eventual red-giant sun engulfing us; the pending collision of the Milky Way and Andromeda galaxies. Nor am I talking about the record of short-lived survival of our forerunners, like the Neanderthals, Denisovans, and Homo erectus, all of whom slid into extinction after unimpressive spans.

Rather, I’m speaking of cosmic death!

Cosmic death will occur according to standard physics, including cosmology. Because of the accelerating expansion of the universe and the irrepressibility of entropy — the headlong plunge toward evermore disorder and chaos — eventually no new stars will form, and existing stars will burn out. The universe will become uninhabitable long before its actual demise. Eventually a near vacuum will result. Particles that remain will be so unimaginably distanced from one another that they’ll seldom, if ever, interact. This is the ultimate end of the universe, when entropy reaches its maximum or so-called thermodynamic equilibrium, more descriptively dubbed ‘heat death’. There’s no place to duck; spacefaring won’t make a difference. Nowhere in the universe is immune.

Assuredly, heat death will take trillions of years to happen. However, might anyone imagine that the timeframe veils the true metaphysical significance of universal extinction, including the extinction of humans and all other conscious, intelligent life? And does it really make a difference if it’s tens of years or tens of trillions of years? Don’t the same ontological questions about being still searingly pertain, irrespective of timescale? Furthermore, does it really make a difference if this would be the so-called ‘sixth extinction’, or the thousandth, or the millionth, or the billionth? Again, don’t the same questions still pertain? There remains, amidst all this, the reality of finality. The consequences — the upshot of why this actuality matters to us existentially — stay the same, immune to time.

So, to ask ‘what is the meaning of life?’ — that old chestnut from inquiring minds through the millennia — likely becomes moot and even unanswerable, in the face of surefire universal extinction. As we contemplate the wafer-thin slice of time that makes up our eighty-or-so-year lifespans, the question seems to make a bit of sense. That select, very manageable timeframe puts us into our comfort zone; we can assure ourselves of meaning, to a degree. But the cosmological context of cosmic heat death contemptuously renders the question about life’s purpose without an answer; all bets are off. And, in face of cosmic thermodynamic death, it’s easy to shift to another chestnut: why, in light of all this, is there something rather than nothing? All this while we may justifiably stay in awe of the universe’s size and majesty, yet know the timing and inevitability of our own extinction rests deterministically in its hands.

A more suitable question might be whether we were given, evolutionarily, consciousness and higher-order intelligence for a reason, making it possible for us to reflect on and try to make sense of the universe. And where that ‘reason’ for our being might originate: an ethereal source, something intrinsic to the cosmos itself, or other. It’s possible that the answer is simply that humankind is incidental, consigning issues like beginnings to unimportance or even nonsense. After all, if the universe dies, and is itself therefore arguably incidental, we may be incidental, too. Again, the fact that the timeframe is huge is immaterial to these inquiries. Also immaterial is whether there might, hypothetically, be another, follow-on Big Bang. Whereby the cosmological process restarts, to include a set of natural physical laws, the possible evolution of intelligent life, and, let’s not overlook it, entropy all over again.

We compartmentalise our lives, to make sense of the bits and pieces that competitively and sometimes contradictorily impact us daily. And in the case of cosmic death and the extinction of life — ours and everyone else’s possibly dotting the universe — that event’s speck-like remoteness in distant time and the vastness of space understandably mollifies. This, despite the event’s unavoidability and hard-to-fathom, hard-to-internalise conclusiveness, existential warts and all. To include, one might suppose, the end of history, the end of physics, and the end of metaphysics! This end of everything might challenge claims to any singular specialness of our and other species, all jointly riding our home planets to this peculiar end. 

Perhaps we have no choice, in the meantime, to conduct ourselves in ways that reflect our belief systems and acknowledge the institutional tools (sociological, political, spiritual) used to referee those beliefs. As an everyday priority, we’ll surely continue to convert those beliefs into norms, to improve society and the quality of life in concrete, actionable ways. Those norms and institutions enable us to live an orderly existence — one that our minds can plumb and make rational sense of. Even though that may largely be a salve, it may be our best (realistically, only) default behaviour in contending with daily realities, ranging from the humdrum to the spectacular. We tend to practice what’s called ‘manic defence’, whereby people distract themselves by focusing on things other than what causes their anxiety and discomfort.

The alternative — to capitulate, falling back upon self-indulgent nihilism — is untenable, insupportable, and unsustainable. We are, after all, quite a resilient species. And we live every day with comparatively attainable horizons. There remains, moreover, a richness to our existence, when our existence is considered outside of extraordinary universal timeframes. Accordingly, we go on with our lives with optimism, not dwelling on the fact that something existential will eventually happen — our collective whistling past the graveyard, one might say. We seldom, if ever, factor this universal expiry date into our thinking — understandably so. There would be little to gain, on any practical level, in doing otherwise. Cosmic thermodynamic death, after all, doesn’t concern considerations of morality. Cosmic death is an amoral event, devoid of concerns about its rightness or wrongness. It will happen matter of factly.

Meanwhile, might the only response to cosmic extinction — and with it, our extinction — be for the universe and humanity to shrug?