Photo by Nicholas Doherty on Unsplash

The Knepp Estate in West Sussex, England looked like a disaster in the making. When Charlie Burrell inherited the struggling 3,500-acre farm in the 1990s, conventional wisdom said he should maximize productivity: modernize equipment, apply more fertilizer, expand livestock operations. Instead, he did something radical. He stopped farming.

By 2001, Burrell and his wife Isabella removed the fences, stopped pesticide applications, and let nature take over. What happened next surprised everyone. Within fifteen years, the property had transformed into a thriving ecosystem. Turtle doves returned for the first time in decades. The rare purple emperor butterfly came back. Nightingales nested where there had been silence. Today, Knepp is considered one of Europe's most successful rewilding projects, proving that sometimes the best thing humans can do is step back.

But here's the uncomfortable truth: Knepp is the exception, not the rule.

The Rewilding Industry's Hidden Failure Rate

Rewilding has become fashionable. Conservation organizations tout it as a silver bullet for biodiversity loss. Tech billionaires fund it. Governments tout five-year plans. Yet according to a 2022 analysis by researchers at the University of Copenhagen, approximately 70% of rewilding projects fail to meet their ecological targets within ten years. Some collapse much faster.

Consider the Oostvaardersplassen wetland in the Netherlands. Created in 1968 as an ambitious rewilding experiment, it promised to restore natural wetland ecosystems. By the 2000s, the project had become an ecological and public relations nightmare. Overpopulated herds of elk and deer were starving, leading to mass die-offs that shocked visitors. Animal welfare advocates and ecologists fought bitterly. By 2018, the Dutch government intervened with controversial culling programs that made international headlines for all the wrong reasons.

The problems are more fundamental than people realize. Most rewilding efforts are built on shaky assumptions: that if you remove human influence, nature will automatically return to some ideal state. They don't account for climate change, fragmented habitats, invasive species already embedded in ecosystems, or the fact that many landscapes have been altered so thoroughly that "natural" states are actually historical guesses.

The Missing Ingredient: Connectivity

Here's what most rewilding projects get wrong: they focus on individual sites in isolation. A 500-acre restoration in California means nothing if it's surrounded by highways, suburbs, and agricultural monocultures. Animals can't establish populations if they can't reach other populations. Genetic diversity crashes. Evolution stalls.

The best rewilding efforts work because they think regionally. The European Green Belt initiative takes this seriously. Stretching 7,600 kilometers along the former Iron Curtain between Russia and Norway, it wasn't designed as a single unified project. Instead, organizations have been creating wildlife corridors—strips of protected land that allow animals to move across fragmented habitats. Wolves have returned to Germany. Lynx populations are rebounding. But it took coordinating work across seventeen countries and two decades of effort.

Most rewilding projects operate on shoestring budgets with five-year funding cycles. You can't rewild a region that way. It's like trying to restore a forest by planting trees on Tuesdays.

The Climate Change Complication Nobody Wants to Discuss

There's a conversation rewilding advocates are avoiding. What happens when you're restoring ecosystems for a climate that no longer exists?

A western pine forest being restored in Oregon today will face dramatically different precipitation patterns by 2050. The species you're planting might not survive. The predator-prey relationships you're trying to recreate might collapse. Earlier spring thaws mean migratory animals arrive to find no food. Longer fire seasons burn through restored areas before they can establish.

Some scientists now argue we need "assisted migration"—deliberately moving species to places where they might survive in future climates, rather than trying to restore historical compositions. But this is controversial. How do you decide which species go where? What if you accidentally introduce something that becomes invasive? Are you still doing restoration, or are you just rearranging the deck chairs on a sinking ship?

Yet some projects are starting to grapple with this honestly. The Nature Conservancy's work in the Sierra Nevada involves intentionally planting heat and drought-tolerant tree species alongside native ones, creating forests that might actually survive the next seventy years.

What Actually Works: Long-Term Commitment and Flexibility

The rewilding projects that succeed share common features. They have funding secured for at least twenty years. They adapt based on what they observe rather than sticking to rigid original plans. They work at landscape scales, not isolated patches. And crucially, they accept that they're not restoring some pristine past—they're creating new ecosystems that hopefully support more biodiversity than what currently exists.

The restoration of the Danube Delta shows this pragmatism. Rather than trying to return it to pre-industrial conditions (impossible), managers work with the current conditions while expanding habitat for wetland species. The results are solid if not spectacular: bird populations are up, fish productivity is higher, and the region has economic benefits from tourism and fishing.

The rewilding movement needs to grow up. This means honest conversations about what's actually achievable, proper funding commitments, regional coordination, and acceptance that we're managing ecosystems for a changed planet, not recreating some fantasy of pristine nature. It means less glossy marketing about returning wolves and bears (though that's fine) and more attention to the tedious work of building habitat corridors and managing invasive species.

Knepp works because Burrell committed to a vision without knowing the outcome, then adjusted based on what the land told him. He had the resources to stick with it. Most rewilding doesn't have either advantage. That's why most rewilding fails, and why the movement's real work is just beginning. Related to these challenges, Ghost Forests Are Drowning America's Coasts—And Nobody's Stopping Them explores how coastal ecosystems are being transformed in ways we're still struggling to understand and address.