The phrase “peak soil” suggests that the world could reach a point beyond which soil productivity enters a lasting decline. We examine whether this idea helps people understand soil degradation and whether it provides a reliable basis for policy.
We recognise its value as a warning. Like “peak oil”, it attracts attention to a resource on which society depends. However, soil is a living, diverse system whose condition can improve or deteriorate. Different soils face different pressures, and some damaged functions can recover through better management. A single global peak therefore risks hiding regional differences and implying that decline is unavoidable.
We also question what would be measured: soil quantity, agricultural productivity or the ability to provide benefits such as clean water and biodiversity. Without clear definitions and indicators, the metaphor cannot reliably diagnose problems or demonstrate progress.
We propose linking its communicative strengths with soil security. This framework considers capacity, what soil can inherently do; condition, its current state; capital, its value; connectivity, people’s knowledge and engagement; and codification, the policies and laws governing its use. Together, these dimensions connect environmental assessment with the economic, social and institutional influences that shape soil management and the prospects for lasting improvement.
For policymakers, we recommend clear, regionally appropriate measurements, sustained monitoring and action tailored to local circumstances. Public communication should convey urgency while showing that prevention and restoration can make a difference. We conclude that “peak soil” can start a conversation, but sound decisions require evidence and a broader assessment framework.
