Pixar's Hoppers has been in cinemas for less than two weeks and it's already one of the most discussed animated films in years — not just for its humour or its animation, but for something rarer: its science is actually correct. The beaver really is a keystone species. The loss of habitat really does cascade across an entire ecosystem. The mayor who wants to pave over the wetland for a road that saves commuters four minutes really does represent something happening everywhere, right now. This is not a metaphor. It's ecology.
If the film left you with an unsettled feeling — that pull of recognition when Mabel realises the animals have already lost so much before the movie even begins — that feeling has a name. It's what biologists call shifting baseline syndrome: each generation inherits a world already diminished, and mistakes that diminished world for normal. The books below are the ones that take that feeling seriously, and don't let you put it down when the credits roll.
Start Here: The Beaver Itself
Bringing Back the Beaver — Derek Gow (2020)
Derek Gow is a Scottish farmer who spent thirty years importing, quarantining, and releasing Eurasian beavers across Britain — against opposition from government agencies, landowners, and a conservation establishment that had forgotten what thriving waterways actually look like. His account of that campaign is often riotously funny and quietly devastating in equal measure. The bureaucrats who block his permits are not villains. They're something worse: people who have normalised the absence of beavers so completely that bringing them back reads as radical.
The scene in Hoppers where the glade has already been abandoned by animals before the film begins — before the mayor has even started his bulldozers — is this book in miniature. We have been living in the aftermath for five hundred years. Gow's book is about what it takes to admit that, and start doing something about it.
Read the full review →The Bigger Picture: What Rewilding Actually Means
Wilding — Isabella Tree (2018)
Isabella Tree and her husband owned Knepp, a 3,500-acre farm in Sussex that was haemorrhaging money and destroying the soil. Their solution was the kind of thing that sounds either obvious or insane, depending on your relationship to control: they stopped. They pulled out the drains, let the hedgerows return, introduced free-roaming animals, rewilded a river. Within years, species that hadn't been seen in England for decades — purple emperor butterflies, turtle doves, nightingales — came back on their own.
Wilding is the most hopeful environmental book I've read. It proves something that Hoppers dramatises in animation: the land remembers what it's supposed to be, if we just stop insisting on what we think it should be. The beaver's dam in the film doesn't create a new ecosystem — it restores one. That's the whole point.
Read the full review →Feral — George Monbiot (2013)
George Monbiot's Feral is the book that put rewilding on the map as a serious ecological and political idea in Britain. His argument is direct: our landscapes are not natural. They are the result of centuries of grazing, draining, clearing, and managing — and what we call "the countryside" is in fact a highly impoverished version of what the land could support. Wolves, lynx, beavers, boars: the predators and engineers whose absence has shaped everything we see.
Where Hoppers shows you what it feels like to lose a habitat, Feral shows you the logic of how it happened — and what the ecological case for recovery actually looks like. Monbiot is a more polemical writer than Tree or Gow, and deliberately so. He wants to make you angry. He succeeds.
Read the full review →The Language of the Living World
Braiding Sweetgrass — Robin Wall Kimmerer (2013)
The most quietly radical idea in Hoppers is not that beavers are clever engineers. It's that the animals have a perspective — that they experience the loss of habitat as loss, that they have something at stake. Mabel's journey into the beaver colony is, at its core, an attempt to stop treating the natural world as scenery and start treating it as a community of beings.
Robin Wall Kimmerer has been arguing this from a different angle for her entire career. A botanist trained in Western science and raised in the Potawatomi tradition, she writes about plants as persons — not as metaphor, but as a serious epistemological claim. The chapter on Skywoman, on the grammar of animacy, on what it would mean to say "who" instead of "what" when we talk about a tree — these are among the most important pages in contemporary nature writing. Read this after Hoppers and the film will retroactively deepen.
Read the full review →Is a River Alive? — Robert Macfarlane (2025)
Macfarlane's 2025 book asks a question that Hoppers dramatises: what changes when we stop calling the natural world "it"? He travels to three rivers on three continents — in Ecuador, India, and Canada — each under a different kind of threat, each with communities fighting to protect it. Threaded through these journeys is a chalk stream near his home in Cambridge, which he walks with his young son across years and seasons.
The legal dimension is what makes this book unusual: Macfarlane embeds himself in the Rights of Nature movement, which argues that rivers and ecosystems should have legal personhood — the right to exist, to flow, to be defended in court. It sounds abstract until you see it working. This is the most recent book on this list, a NYT bestseller, and essential reading for anyone whose first question after Hoppers was: but what can actually be done?
Read the full review →The Original Warning
Silent Spring — Rachel Carson (1962)
Everything on this list has a precursor, and that precursor is Silent Spring. Rachel Carson's 1962 account of how pesticides were moving through food chains — killing not just pests but birds, fish, and ultimately humans — was the book that proved nature writing could change policy. It led directly to the banning of DDT in the United States and the founding of the modern environmental movement.
What makes it relevant here is Carson's central insight, which is also Hoppers' central insight: ecosystems are not collections of separate things. They are webs of relationship. Pull one thread — remove the beavers, spray the insects, drain the wetland — and the whole fabric shifts in ways you cannot predict and may not notice until it is too late. Carson understood this in 1962. We are still learning it.
Read the full review →What the Film Leaves You With
King George's line to Mabel near the end of Hoppers — that the ecosystem includes humans, that we are not outside it looking in but inside it, whether we like it or not — is the oldest idea in ecology and the one we are most determined to forget. Every book on this list is, in different ways, an attempt to remember it.
You don't need to go to Ecuador or rewild a 3,500-acre farm. You don't need to chain yourself to anything. But you might need to change the question you're asking — from "what does nature cost?" to "what does it cost us when nature is gone?" The books above are where that question leads.
Browse the full Nature Writing and Environment archives for everything we've reviewed in these categories.