heterochrony

Compiled with AI assistance and selectively reviewed. Please consult the cited passages; the books remain the authoritative source. About this companion

Editorial synthesis · provisional

Definition

Heterochrony is RB2’s name for the plurality of tempos through which irreversible history is composed. Processes differ in speed, duration, lag and threshold, so development cannot be understood from direction alone. The proposed entry retains this broad book-specific sense while distinguishing it from the narrower developmental-biological usage that the local passage does not separately elaborate and from merely repeating that time moves forward.

Explanation

Law 6 concerns before and after; Law 7 adds fast and slow, overlap, incubation and phase difference. Heterochrony therefore specifies differences within temporal composition, not a second universal clock. The source’s varied examples range from nervous responses and life courses to geology without requiring every process to share one duration.

RB3’s biological comparison shows cells, organisms, colonies and lineages persisting through different turnovers. Such disparities can sustain resilience or expose a system to failure. The proposal retains that role without claiming every timing mismatch is productive or importing an unprovided taxonomy of heterochronic developmental mutations.

The sociocultural account similarly makes institutional, technological and ecological tempos unevenly related. Whether a lag protects memory or creates danger depends on the arrangement. The term is consequently scoped as the book’s general temporal-disparity vocabulary, not a universal prescription to accelerate, slow or synchronize every process.

Scope and attribution

Preserve the explicit broad local definition and contextual consequences.

AB — The Actual Book

Source-verified occurrence; see the printed-page references below.

Occurrence locators: 127, 128, 129.

RB2 — The Real Book, Volume II: Becoming Is Being

Broad heterochrony adds unequal tempos to irreversibility without prescribing one ideal speed.

Occurrence locators: 228, 229, 238, 239, 240, 245, 246, 250, 251.

RB3 — The Real Book, Volume III: Murmurations

Biological coordination includes both resilience and suffering under mismatch.

Occurrence locators: 74, 134, 247.