Editors Reads Verdict
Kolbert's Pulitzer Prize-winning investigation of the ongoing biodiversity crisis is alarming, carefully reported, and scientifically rigorous. One of the most important environmental books of the century.
What We Loved
- Pulitzer Prize-winning journalism combining fieldwork with scientific depth
- The historical context of previous mass extinctions gives the current crisis perspective
- Kolbert's fieldwork takes readers to places where extinction is happening in real time
- Scientific accuracy without sacrificing narrative engagement
Minor Drawbacks
- The cumulative weight of evidence can feel overwhelming without adequate prescriptions
- Some chapters are more engaging than others
- The solutions section is brief compared to the problem documentation
Key Takeaways
- → Earth is currently experiencing its sixth mass extinction — the first caused by a single species
- → The current extinction rate is 100 to 1,000 times the background rate
- → Ocean acidification from CO2 absorption threatens entire marine ecosystems
- → Habitat fragmentation isolates populations and accelerates local extinction
- → The end-Cretaceous extinction that killed the dinosaurs helps calibrate the scale of what we face
| Author | Elizabeth Kolbert |
|---|---|
| Publisher | Henry Holt |
| Pages | 336 |
| Published | February 11, 2014 |
| Language | English |
| Genre | Science, Environment, Journalism |
| Difficulty | Intermediate |
| Best For | Anyone who wants to understand the biodiversity crisis with scientific depth rather than media slogans — and the historical context of mass extinctions. |
The Extinction Happening Around Us
Elizabeth Kolbert is a staff writer at The New Yorker who has spent two decades reporting on environmental science. The Sixth Extinction won the 2015 Pulitzer Prize for General Nonfiction. It is the most rigorous and accessible account available of the biodiversity crisis that is currently underway.
The title refers to the five mass extinctions in Earth’s history — the most recent 66 million years ago, when an asteroid impact wiped out the non-avian dinosaurs — and the ongoing sixth extinction, which is different from all previous ones in a crucial respect: it is being caused by a single species, humans, within a geological eyeblink.
Thirteen Species, Thirteen Stories
Kolbert structures the book around thirteen species at various stages of extinction — some already gone, some clinging to survival in captivity, some declining rapidly in the wild. The American mastodon, the great auk, the golden poison frog, the Panamanian golden frog, the little brown bat, the Sumatran rhino. Each chapter combines field reporting — Kolbert visits the places where each story is unfolding — with the science needed to understand it.
The effect is cumulative. By the time you’ve followed a dozen extinction stories, the abstract concept of a mass extinction becomes visceral and specific.
Ocean Acidification
Among the book’s most alarming chapters concerns ocean acidification — the process by which CO2 absorbed by seawater forms carbonic acid, reducing the ocean’s pH. For organisms that build shells from calcium carbonate (corals, molluscs, many plankton species), acidification represents an existential threat. The chemistry is simple and the implications for marine food webs are severe.
Kolbert visits research stations in the waters of Scotland and off the coast of Papua New Guinea, where the direct effects of acidification are already visible in coral communities.
The Geological Record
The book’s scientific depth comes partly from Kolbert’s serious engagement with paleontology. Understanding previous mass extinctions — their speed, their causes, their aftermath — provides crucial context for interpreting the current crisis. The end-Permian extinction 252 million years ago, which killed 96% of marine species, is the closest analogue to what unconstrained acidification might produce.
Final Verdict
The Sixth Extinction is essential reading for anyone who wants to understand the biodiversity crisis with genuine scientific depth. It is sobering rather than sensationalist — and the sobriety is appropriate.
Our rating: 4.5/5 — One of the most important environmental books of the twenty-first century. Rigorously reported and genuinely alarming.
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