Commons Drain

A hypothesis that locally reasonable use by many actors is depleting a shared stock nobody protects.

The community garden's shared tool shed was fully stocked in spring. By August, half the trowels are missing, the good hose leaks, and nothing has been replaced. Nobody vandalized anything. Every single gardener behaved reasonably: borrowed a tool, kept it one extra week, figured someone else handles maintenance.

Commons Drain is the hypothesis that locally reasonable use by many actors is depleting a shared stock that nobody protects. Its signature is that no individual behavior looks wrong while the shared resource visibly declines. Test it with predictions. If the drain is real, depletion should scale with the number of users, replacement should lag consumption chronically because replenishment belongs to no one, and privately owned equivalents (people's home tools) should be in fine shape. The strongest rival: a few specific heavy users or a one-time event, a theft, account for most of the loss, which is a different problem with a different fix. The distinguishing observation: a simple sign-out log for one month reveals whether loss is diffuse or concentrated. If confirmed, the intervention creates protection where none exists: a named steward, a small shared fund, visible replenishment rules. Punishing individuals for reasonable use will not work, because nobody is the villain. Do not apply the archetype where an owner already exists and is simply failing; that is negligence, not a commons.