# Stephen Jay Gould > **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:** Evolution / History of Science **Doc Type:** Canonical Wiki Node **Maturity:** Developed ## Definition Stephen Jay Gould was a paleontologist and historian of science who co-developed punctuated equilibrium and became a prominent public defender of evolutionary theory. ## Nexus Context The article connects his work to Barricelli’s reported digital stasis-and-turnover patterns and to NCSE’s Project Steve, named in his honor. ## Evidence Boundary Punctuated equilibrium concerns tempo and pattern in species history; it is not a denial of Darwinian evolution or a claim that all change occurs suddenly. ## Relationships [[wiki/Niles Eldredge|Niles Eldredge]], [[wiki/Punctuated Equilibrium|Punctuated Equilibrium]], [[wiki/The National Center for Science Education|The National Center for Science Education]], [[wiki/Fossil Record|Fossil Record]] ## Sources / Provenance - Eldredge and Gould (1972); NCSE Project Steve history.