What is Wild Animal Suffering (WAS)?

The concept of Wild Animal Suffering (WAS) marks a fundamental shift in how we conceptualize our moral duties to the non-human world. While animal rights movements have historically targeted human exploitation—such as laboratory testing, fur farming, and slaughterhouses—the advocates of WAS point out that the quantity of suffering occurring in the wild, entirely independent of human action, is astronomically larger. There are estimated to be between 10¹⁹ and 10²² wild animals on Earth, the vast majority of whom are small vertebrates and invertebrates whose lives are dominated by physical pain and premature death.

This field of study gained significant philosophical traction in the late 20th and early 21st centuries, drawing on the work of utilitarian and antispeciesist thinkers. It challenges the traditional divide between "nature conservation" and "animal welfare." Traditional conservation is concerned with preserving species as abstract types, maintaining biodiversity, and keeping ecosystems functional. From a conservationist perspective, a predator killing a prey animal is not a tragedy; it is a sign of a healthy ecosystem. From a WAS perspective, however, the subjective experience of that individual prey animal—the terror, the physical agony of being torn apart—is a moral bad that we have a prima facie reason to prevent, regardless of its ecological utility.

Opponents of WAS often accuse its proponents of a dangerous anthropocentric hubris, suggesting that humans lack the wisdom to manage ecosystems without causing total ecological collapse. WAS researchers do not deny this danger; instead, they call for the development of "welfare biology"—a systematic, interdisciplinary science dedicated to studying the well-being of wild sentient beings and finding safe, targeted ways to improve their lives without disrupting critical ecological balances.

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