Restoring Ecosystems, Trophic Cascades, and Welfare Complexity
Rewilding is the large-scale restoration of ecosystems to a more wild, self-regulating state â typically involving the reintroduction of keystone species (particularly apex predators) that have been lost from a region. The movement has grown dramatically in the 21st century, with major projects underway across Europe, North America, Africa, and Australasia.
From an animal welfare perspective, rewilding presents a fascinating and complex case: it generally improves the overall functioning of ecosystems and may benefit many species, but it also creates conditions where individual animals may suffer through predation, starvation, or competition â raising deep questions about population-level vs. individual welfare.
The reintroduction of wolves to Yellowstone National Park in 1995â1996 is the most studied example of rewilding's ecosystem effects. The "trophic cascade" that followed demonstrated how apex predators can transform entire landscapes:
Philosophers and researchers working on wild animal welfare (including Oscar Horta and the Wild Animal Initiative) note that wild animals experience enormous amounts of suffering from disease, parasitism, starvation, and predation regardless of rewilding. The question is whether rewilding increases or decreases net suffering â a question that requires empirical research to answer for specific contexts.
Wolves have naturally returned to Germany, Belgium, Netherlands, and Denmark. Rewilding Europe is supporting managed reintroductions across the continent.
Cheetah reintroduction to India (Kuno National Park, 2022) â the first intercontinental predator reintroduction. Early welfare challenges with adaptation mortality being carefully monitored.
Beaver reintroduction projects across Scotland, England, and Wales are demonstrating dramatic landscape transformation â wetland creation benefiting hundreds of species.
Trophic rewilding with dingoes and reintroduction of locally extinct marsupials; fenced "safe havens" protecting vulnerable species from invasive predators.
Rewilding generally produces net positive outcomes for wildlife populations and ecosystem health. The welfare considerations are genuine and important â reintroduction stress, predation, and conflict must be managed thoughtfully. But with appropriate welfare-conscious implementation, rewilding represents one of the most promising large-scale interventions for wildlife welfare available today, restoring conditions that allow wild animals to live fuller, healthier lives.