Merrill Flood

Merrill M. Flood (1908–1991) was an American mathematician who, with Melvin Dresher at the RAND Corporation in 1950, devised the experimental game that Albert Tucker would later name the Prisoner's Dilemma. Flood's original work was part of a broader RAND research program on strategic conflict and nuclear deterrence, applying mathematical rigor to the most consequential decisions of the Cold War.

Flood's contributions extended beyond game theory to operations research, management science, and the early development of linear programming. His work on the traveling salesman problem and network optimization helped establish the mathematical foundations of modern logistics and supply chain management. The Prisoner's Dilemma experiment was a minor footnote in a career dedicated to applying mathematical reasoning to practical organizational problems, yet it became the most influential concept in all of game theory — a case study in how the most cited ideas often emerge from the least expected sources.