Harold W. Kuhn
A Princeton mathematician who gave economists and strategists the essential tools to solve complex optimization and game theory problems.
1925–2014 (age 89)·American game theorist·Birthday: July 29·The Greatest Generation
Biography
Harold Kuhn operated at the fertile intersection of mathematics, economics, and practical problem-solving. At Princeton, he was less a secluded theorist and more a brilliant fixer of puzzles, translating abstract mathematical concepts into algorithms the real world could use. His name is permanently attached to the Karush–Kuhn–Tucker conditions, a cornerstone of nonlinear programming that tells engineers and economists how to find the best possible outcome given a set of constraints. He famously 'described' the Hungarian method for solving assignment problems, a crucial algorithm, though he later discovered a 19th-century mathematician had beaten him to it. A devoted historian of his field, he unearthed and preserved the work of earlier thinkers, ensuring figures like John von Neumann and John Nash received their due. His career was a testament to the power of clear mathematical thinking to organize human decisions.
The Greatest Generation
1901–1927
Grew up during the Depression, fought World War II, and built the postwar economic boom. Defined by shared sacrifice, institutional trust, and a belief that hard work and loyalty would be rewarded.
Harold was born in 1925, placing them squarely in The Greatest Generation. The events that shaped this generation — world wars, depression, and rapid industrialization — shaped the world they entered and the choices available to them.
#1 When Harold Was Born
The biggest hits of 1925
#1 Movie
The Gold Rush
Harold's Life & Times
The world at every milestone
1925Born
The Scopes Trial debates evolution in schools
Home: $4,366President: Calvin Coolidge"Sweet Georgia Brown" — Ben Bernie
1930Started school
Pluto discovered
Gas: $0.20/galHome: $3,510President: Herbert Hoover"Body and Soul" — Paul WhitemanBest Picture: All Quiet on the Western Front
1938Became a teenager
Kristallnacht and the escalation toward WWII
Gas: $0.20/galHome: $2,850Min wage: $0.25/hrPresident: Franklin D. Roosevelt"Begin the Beguine" — Artie ShawBest Picture: You Can't Take It with You
1941Could drive
Pearl Harbor attack brings the US into WWII
Gas: $0.19/galHome: $3,060Min wage: $0.30/hrPresident: Franklin D. Roosevelt"Chattanooga Choo Choo" — Glenn MillerBest Picture: How Green Was My Valley
1943Could vote
Allies invade Sicily; Battle of Stalingrad ends
Gas: $0.21/galHome: $3,290Min wage: $0.30/hrPresident: Franklin D. Roosevelt"I've Heard That Song Before" — Harry JamesBest Picture: Casablanca
1946Turned 21
United Nations holds its first General Assembly
Gas: $0.21/galHome: $5,150Min wage: $0.40/hrPresident: Harry S. Truman"Prisoner of Love" — Perry ComoBest Picture: The Best Years of Our Lives
1955Turned 30
Rosa Parks refuses to give up her bus seat
Gas: $0.29/galHome: $9,550Min wage: $0.75/hrPresident: Dwight D. Eisenhower"Rock Around the Clock" — Bill Haley & His CometsBest Picture: Marty
1965Turned 40
US sends combat troops to Vietnam
Gas: $0.31/galHome: $13,600Min wage: $1.25/hrPresident: Lyndon B. Johnson"(I Can't Get No) Satisfaction" — The Rolling StonesBest Picture: The Sound of Music
1975Turned 50
Fall of Saigon ends the Vietnam War
Gas: $0.57/galHome: $27,600Min wage: $2.10/hrPresident: Gerald Ford"Love Will Keep Us Together" — Captain & TennilleBest Picture: One Flew Over the Cuckoo's Nest
1985Turned 60
Live Aid concerts raise money for Ethiopian famine
Gas: $1.12/galHome: $62,900Min wage: $3.35/hrPresident: Ronald Reagan"Careless Whisper" — Wham!Best Picture: Out of Africa
1995Turned 70
Oklahoma City bombing; Windows 95 released
Gas: $1.15/galHome: $96,500Min wage: $4.25/hrPresident: Bill Clinton"Gangsta's Paradise" — CoolioBest Picture: Braveheart
2005Turned 80
Hurricane Katrina devastates New Orleans; YouTube launches
Gas: $2.30/galHome: $167,500Min wage: $5.15/hrPresident: George W. Bush"We Belong Together" — Mariah CareyBest Picture: Crash
2014Died at 89
Russia annexes Crimea; Ebola outbreak in West Africa
Gas: $3.37/galHome: $160,700Min wage: $7.25/hrPresident: Barack Obama"Happy" — Pharrell WilliamsBest Picture: Birdman
Key Achievements
- Co-established the Karush–Kuhn–Tucker conditions, fundamental theorems in nonlinear programming and optimization.
- Awarded the John von Neumann Theory Prize in 1980 for his contributions to game theory and mathematical economics.
- Formulated Kuhn's theorem, which states that every finite extensive-form game with perfect recall has a mixed-strategy Nash equilibrium.
- Played a key role in editing and publishing the collected works of John von Neumann.
Did You Know?
He was the doctoral advisor to John Nash, the subject of the film 'A Beautiful Mind.'
He discovered that the 'Hungarian method' he described had actually been formulated by Carl Gustav Jacobi in 1890.
He served in the U.S. Army Air Forces during World War II, working on weather forecasting.
“The solution to a problem changes the problem.”
