Before the Threshold: Deceptive Stability, Buffer Slack, and Earth System Transitions

Gabriel John-Toussaint DuPree 

Earth history includes episodes in which persistent biological or geophysical byproduct loads are absorbed by finite environmental sinks and buffers, preserving apparent stability while the capacity to absorb further stress declines. This paper synthesizes literatures on Earth system revolutions, redox transitions, mass extinctions, and Anthropocene change into a comparative framework termed Buffered Byproduct Regime Shift (BBRS). BBRS organizes such transitions into a six-phase sequence from load emergence and buffered accumulation during a Deceptive Stability Interval to threshold crossing, selective mortality, and successor-regime reorganization. The paper’s contribution is diagnostic and comparative. It brings persistent load, sink-mediated lag, declining buffer capacity, observable pass-through, selective vulnerability, and successor-regime structure into a single evidentiary sequence for evaluating when apparent stability is being maintained by continued buffer function despite declining regime compatibility. The framework distinguishes gradual saturation from threshold-collapse buffer failure, introduces graded case membership, and uses the K-Pg event as a negative-control discriminator. It is applied to the Great Oxidation Event, the end-Permian crisis, the Ediacaran–Cambrian transition, the PETM, and the Anthropocene. Across these cases, BBRS also distinguishes byproduct valence: whether accumulated waste becomes an exploitable free-energy gradient for successor regimes or remains spent material that tightens constraints until a closure pathway is built. In this framing, false negatives, trait-selective vulnerability, institutional lag, and degraded archives become linked expressions of the same architecture: functioning buffers can suppress ambient change while transferring risk into slack loss, spatial heterogeneity, preservation loss, or dependence on a filtered baseline. Slack loss may therefore appear first as spatial patchiness, incomplete recovery between cycles, source/sink divergence, proxy dropout, or archive degradation before familiar observables respond. The Anthropocene application frames intervention timing as a problem of whether a system producing its own destabilizing load can recognize declining buffer slack before the calm produced by buffering reinforces the forcing that closes the effective intervention window.