1852 – 1949
John Neville Keynes (1852–1949) was a British logician and economist, best known for his systematic treatise on formal logic and his methodological contributions to political economy. Father of John Maynard Keynes, he held administrative and academic positions at Cambridge and produced foundational work distinguishing descriptive from normative economics. His logical writings engaged closely with questions of inference, modal reasoning, and the logic of future contingencies.
Authored Studies and Exercises in Formal Logic (1884), a widely used university textbook on classical logic
Introduced the influential tripartite distinction between positive economics, normative economics, and the art of economics
Engaged with temporal and modal logic, including formal treatment of future contingent propositions
Authored The Scope and Method of Political Economy (1891), shaping the methodology of economics as a discipline
Served as Registrary of the University of Cambridge, contributing to its administrative development