the adjacent possible

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

The adjacent possible is the field of next opportunities genuinely reachable from a system's present organization, rather than everything imaginable. Entering a new configuration can open further possibilities that were not previously actionable. Attributed to Kauffman, the concept connects novelty with expanding possibilities without implying a preset goal, unrestricted invention, or preservation of the historical alternatives that actualization has already foreclosed.

Explanation

AB introduces the term through doors reachable from a particular room and defines it as next steps one move away. New organization becomes a constraint and a platform for further novelty, but different domains realize this grammar by different mechanisms. Its account of irreversibility explicitly reconciles widening forward possibilities with the loss of roads not taken; novelty also needs retention if it is to last.

RB1 develops the evolutionary concept through available opportunities, technological combinations and new biological functions. Its quoted formulation of possibilities available at a given stage is sourced to Björneborn, with one note citing Loreto, rather than presented as a direct Kauffman quotation. Kauffman's stronger claim about an evolving phase space is attributed as an argument, not a license to violate physics. RB2 places the adjacent possible beside Bergson's creative duration: new forms make pathways actionable, so the future is partly unmade rather than merely unknown.

Scope and attribution

Positive scope is AB, RB1 and RB2. PB's bodily possibilities and RB3's ethical keeping-open of futures are neighboring topics rather than direct evidence of the named concept.

AB — The Actual Book

Current organization constrains the next-step field. New forms open doors while irreversible history closes roads left behind. Widening ahead does not undo foreclosure, and novelty alone does not ensure lasting organization.

Occurrence locators: 47, 49, 50, 51, 52, 53, 63, 127; Glossary: 222, 223; Thinker register: 230; Notes: 238.

RB1 — The Real Book, Volume I: The Possible Is Real

Opportunities arise in evolution, technological recombination and biological enablement. Changing phase space is Kauffman's argument, compatible with physical law. The quoted available-possibilities formulation has Björneborn/Loreto provenance.

Occurrence locators: 144, 165, 166, 168, 174, 182, 183, 186, 187, 188, 200, 202, 228; Notes: 286.

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

RB2 links creative duration to Kauffman's real adjacent possible. Newly generated forms bring affordances and pathways into actionable existence, making the future partly unmade rather than merely unknown.

Occurrence locators: 233.

Background used in the editorial explanation

Domain-specific mechanisms and wider analogies remain distinguished. Original definitions retain their scope; local cross-references do not rewrite them. Named theories and mechanisms are distinguished from neighboring background, homonyms and the author’s own synthesis. Reproduced AI passages retain their separate voice.