# Bitcoin Cash > **Machine-Evolution Nexus:** [[articles/Digital Darwinism and the Invisible World of Machine Evolution|Digital Darwinism and the Invisible World of Machine Evolution]] places this node within the history and governance of substrate-independent evolution. **Domain:** Blockchain / Technological Lineage **Doc Type:** Canonical Wiki Node **Maturity:** Developed ## Definition Bitcoin Cash is a blockchain lineage created by a 2017 hard fork of Bitcoin associated with disagreement over transaction capacity and scaling. ## Nexus Context It is a clean example of common technical ancestry followed by persistent protocol, community and market divergence. ## Evidence Boundary The split is technological and cultural descent, not equivalent to biological speciation without an explicit mapping of reproduction and selection mechanisms. ## Relationships [[wiki/Bitcoin|Bitcoin]], [[wiki/Hard Fork|Hard Fork]], [[wiki/Branching Descent|Branching Descent]], [[wiki/Cultural Evolution|Cultural Evolution]] ## Sources / Provenance - Bitcoin Cash and Bitcoin protocol histories.