
1905 – 1975
Conrad Hal Waddington (1905–1975) was a British developmental biologist and philosopher of science whose work bridged embryology, genetics, and evolutionary theory. He is best known for coining the concept of the 'epigenetic landscape' and for his philosophical scrutiny of the logical and epistemological foundations of modern biology. His later work engaged seriously with process philosophy and the philosophy of science as applied to living systems.
Coined the concept of the 'epigenetic landscape' as a model for developmental canalization
Introduced 'genetic assimilation' — demonstrating how environmentally induced traits could become genetically fixed
Established foundational usage of the term 'epigenetics' in modern developmental biology
Critically examined the epistemological status of natural selection as scientific theory
Organized influential Theoretical Biology symposia connecting biology with philosophy and systems thinking