Book Review of ‘Until the End of Time: Mind, Matter, and Our Search for Meaning in an Evolving Universe’, by Brian Greene
Pages: 448
Review by Anil Saxena
A Journey Beyond Our Bubbles
Today I want to discuss this astonishing book on science, the universe, and the fate of humanity.
We generally remain trapped in bubbles of our own beliefs, faiths, prejudices, convictions, religiosity, and social connections, and often seek answers to life’s mysteries only within these silos. Yet sometimes, when we gaze at the starry heavens, deeper questions begin to rankle in our minds. Despite our pretensions, our everyday frameworks fail to give us sincere answers.
If you often ask:
- Who are we?
- Where did we come from?
- Where are we going?
…and if you are curious about the origins of the universe (the Big Bang), the creation of stars, galaxies, planets, life, and ultimately us, then this book is for you.
As Brian Greene writes:
“We are all temporary constellations of particles, assembled by the laws of physics, tracing a path from the Big Bang to the far future.”
Why This Book Matters
If these questions disturb you too, and if you are curious and scientifically inclined enough to seek truth beyond religion and spirituality, Greene’s work is a treasure.
Brian Greene, a theoretical physicist and acclaimed science writer, belongs to the intellectual league of Carl Sagan, Stephen Hawking, and Richard Dawkins. An unabashed materialist and reductionist, his worldview reflects clearly in his writing.
It is nothing short of miraculous that humans — with a fleeting lifespan of about 100 years — can contemplate not only the Big Bang, but also the possible end of the universe, trillions upon trillions of years away.
Importantly, Greene makes this cosmic journey accessible. There isn’t a single mathematical equation in the book to harass non-mathematicians. If numbers scare you, rest assured — you can still enjoy and understand this book.
The Five Premises of Greene’s Worldview
Before delving deeper, Greene grounds his work in five key premises:
- Einstein’s theories of special and general relativity
- Quantum mechanics
- The laws of thermodynamics
- Darwinism
- The absence of a grand design or invisible hand in creation
Relativity and Quantum Mechanics
These theories are famously complex, but Greene explains them with clarity. Even with a nodding acquaintance, you won’t find difficulty following his exposition. Otherwise, take them as foundational assumptions — the book still works beautifully.
Thermodynamics and Entropy
The first law: Energy can neither be created nor destroyed.
The second law introduces entropy: as time progresses, all systems deteriorate. High entropy equals greater disorder. For example:
- We are born with low entropy (infants) and age toward high entropy (death).
- A cigarette begins as a low-entropy system; when smoked, it disintegrates into smoke, ash, and carcinogens — a high-entropy state.
Greene also reminds us: entropy is probabilistic. On unimaginably rare occasions, its reverse may occur. “Anything with more than zero probability can happen, given enough time.” This includes bizarre scenarios like Van Gogh’s painting spontaneously reverting to a blank canvas or a monkey typing out Shakespeare’s sonnets.
Darwinism
Simply put, offspring resemble their parents but are never identical. Variations accumulate over generations, leading to new species. Natural selection favors the fittest, transmitting advantageous traits. This relentless process of adaptation and evolution has continued since life first appeared — and will persist as long as life exists.
Structure of the Book: Creation and Destruction
Greene divides his narrative into two phases:
- The Creative Phase – the emergence of the universe, stars, galaxies, planets, and life.
- The Destructive Phase – the universe’s inevitable decline into oblivion.
The Empire State Analogy
Greene offers a striking analogy: imagine the lifespan of the universe as the 102 floors of the Empire State Building.
- The ground floor represents the first 10 years after the Big Bang.
- The first floor, 100 years.
- The second floor, 1,000 years.
- Today, 13.8 billion years later, humanity stands just above the 10th floor.
We still have 92 floors to ascend.
From Plasma to Planets: The Birth of Stars and Life
Immediately after the Big Bang, matter existed as hot plasma filled with electrons, neutrons, neutrinos, and protons. These particles expanded at the speed of light, cooled, and clumped together under gravity. Nuclear fusion began, giving rise to hydrogen, helium, energy, and eventually stars, galaxies, and planets.
Thus, gravity emerges as the key cause of our very presence on Earth.
On one insignificant planet orbiting an ordinary star, amino acids and proteins formed. Life appeared, first as unicellular organisms, then multicellular, gradually evolving toward homo sapiens.
With humans came consciousness, intelligence, language, storytelling, religion, free will, art, and music. Greene marvels at this momentous journey: some minds not only decipher the universe’s mysteries but also imagine its distant future.
A Fusion of Science and the Humanities
One of the book’s strengths is how Greene bridges physics and philosophy, science and literature. He discusses Einstein, Schrödinger, Darwin, Watson and Crick, supernovas, black holes, and the Higgs field — but also Shakespeare, Proust, Walt Whitman, Kafka, the Nasadiya Sukta from the Rig Veda, the concept of Sunyata, and Buddha.
As he notes:
“Within us, the cosmos has become conscious. We are the means by which the universe contemplates itself.”
Einstein’s Dreams and Discoveries
Greene highlights Einstein’s vision of gravitational ripples around massive bodies, unconfirmed in his lifetime. But in 2015, scientists detected them from colliding black holes — billions of years after the event. Detectors in Louisiana and Washington caught the precise signals, confirming Einstein’s genius.
Similarly, the Higgs field (the so-called “God particle”) was confirmed in 2018 at CERN’s Large Hadron Collider. Greene writes about these discoveries with awe and lyrical excitement.
Even great scientists erred. Einstein initially believed in a static universe, though his equations predicted otherwise. Edwin Hubble’s discovery of cosmic expansion (redshift) forced Einstein to reconcile with an expanding universe.
The cause? Scientists today speculate about dark energy — mysterious and unproven, but possibly the driving force behind the universe’s accelerating expansion.
The Phase of Destruction
From the 12th floor (1.38 trillion years) onwards, destruction begins. By then, the Sun will have devoured Venus, possibly ejecting Earth from its orbit. By the 15th floor, the universe may be a lost cause.
Yet scientists speculate:
- Could Boltzmann brains (disembodied consciousnesses) emerge?
- Could entropy reverse in pockets of the cosmos?
- Could the universe undergo cycles of big crunches and big bounces, echoing Hindu cosmology?
Ultimately, however, despite these possibilities, the universe will fade beyond the cosmic horizon. Its light will never return.
As the great Urdu poet Meer Taqi Meer wrote:
“Ulti ho gayin sab tadbirein, kuch na dawa ne kaam kiya…”
(All remedies failed, nothing could save it.)
Humanity, Stories, and the Arts
Greene also speculates about the origins of life through “molecular Darwinism” — where smart molecules begin replicating in unconventional ways.
Language, myths, and religion, he argues, gave humans a survival advantage. Stories, like flight simulators, allow us to practice life’s complexities. Religion provides affinity, brotherhood, and solace, strengthening survival.
What about art and music? Are they mere indulgences? Greene disagrees. He believes arts and music are not only survival tools but also sources of inspiration and creativity. He notes Einstein’s reliance on music, not mathematics, for his deepest insights.
As Greene writes,
“Without art and imagination, humankind cannot soar to new heights.”
A Book to Be Chewed and Digested
There are few books that should not only be read but “chewed and digested.” Until the End of Time is one of them — a feast for thinking minds.
Greene’s final words encapsulate the essence:
“As we hurtle toward a cold and barren cosmos, we must accept that there are no grand designs. Particles are not endowed with purposes. There is no final answer hovering in the depths of space awaiting discovery. Instead, certain special collections of particles can think and feel and reflect, and within these subjective worlds they can create purpose… The only direction is to look inward, on the highly personal journey of constructing our own meaning.”
My Final Reflection
Is this the voice of a materialist scientist? Or of an Eastern mystic, a Buddhist, or a Sufi? I leave it to you to ponder.
What is undeniable is that Brian Greene has given us a book that challenges, inspires, and humbles. Until the End of Time is both a cosmic chronicle and a meditation on human meaning — a work that should not be missed.
Author Bio: Anil Saxena
Anil Saxena is a retired Principal Chief Conservator of Forests and Head of Forest Force (HoFF), Maharashtra.
A lifelong nature lover and prolific reader, he brings depth, clarity, and insight to every book he reviews. As a Core Committee member of the Nagpur Book Club, he is known for his comprehensive reviews that make even complex subjects accessible and engaging.
Anil Saxena divides his time between Nagpur, Mumbai, and New York, enjoying the company of his children and grandchildren while continuing to explore the world of literature.
