Agriculture kills astronomical numbers of invertebrates through tillage, pesticides, and habitat conversion — a welfare consideration rarely included in food system discussions despite the enormous scale involved.
Agricultural invertebrate welfare sits at the frontier of moral consideration — the welfare relevance of earthworms and other soil organisms is genuinely uncertain, and most moral frameworks that consider invertebrates at all focus on bees and other more cognitively complex insects. Yet the scale of invertebrate death in agriculture is almost incomprehensible — billions of organisms per field per season. If these organisms have any morally relevant experience, the aggregate harm from agricultural practices is enormous. Even under significant uncertainty about their moral status, the precautionary principle and the ecological value of invertebrate communities justify agricultural practices that minimize unnecessary invertebrate killing.