Game theory

Key people

• John von NeumannHungarian and American mathematician and physicist (1903–1957)
• John Forbes NashAmerican mathematician and economist (1928–2015)
• Thomas SchellingAmerican economist (1921-2016)
• Yanis VaroufakisGreek economist and politician

Timeline

• 1950In the 1950s, it was extended to the study of non zero-sum games, and was eventually applied to a wide range of behavioral relations.
• 1959The 1959 military science fiction novel Starship Troopers by Robert A.
• 1960Quine (1960, 1967), Lewis (1969) used game theory to develop a philosophical account of convention.
• 1970In the 1970s, game theory was extensively applied in biology, largely as a result of the work of John Maynard Smith and his evolutionarily stable strategy.
• 1974The 1974 novel Spy Story by Len Deighton explores elements of game theory in regard to cold war army exercises.

Read

• Game TheoryE. N. Barron · 2008Book
• StrategyJoel Watson · 2001Book
• Strategies and gamesPrajit K. Dutta · 1999Book
• Algorithmic game theoryNoam Nisan · 2007Book

Watch

• Why you should learn the classic game theory games: Prisoner’s Dilemma, Battle of the Sexes, etcAshley HodgsonVideo
• Game Theory Economics || Nash Equilibrium || Dominant Strategy || Operations ResearchMS Study Guru by Dr. Simranjit KaurVideo
• How Decision Making is Actually Science: Game Theory ExplainedSciShowVideo

Listen

• Game TheoryGame TheoryPodcast
• Game Theory PodcastSam VeceniePodcast
• Yale Open Courses ECON 159: Game TheoryWilliam SheppardPodcast
• Game Theory ExplainedIshita MehraPodcast

Voices to follow

• Kevin J. S. Zollman@KevinZollman · XResearcher
• João Pedro Neto@jpnto · XPh.D. Universidade Técnica de Lisboa 2001
• Yanis Varoufakis@yanisvaroufakis · XGreek economist and politician
• Chris von Csefalvay@epichrisis · XBritish-Hungarian AI researcher and computational epidemiologist

Debates

• Does game theory accurately predict human behavior in real-world scenarios?One view: Yes, game theory provides robust models for rational decision-making, offering insights into strategic interactions in economics, politics, and social science. · Another: No, human behavior is often influenced by irrationality, emotions, and social norms, making pure game-theoretic predictions unreliable in many complex situations.Open question
• Is it ethical to apply game theory to all decision-making, including moral dilemmas?One view: Yes, game theory can help identify optimal outcomes and potential consequences in ethical dilemmas, promoting more informed and consistent decision-making. · Another: No, reducing moral choices to strategic calculations risks devaluing intrinsic human values and duties, potentially leading to outcomes that are rational but ethically questionable.Open question

Glossary

• Nash EquilibriumA state in a game where no player can improve their outcome by changing their strategy, assuming other players' strategies remain unchanged.
• Prisoner's DilemmaA classic game showing why two rational individuals might not cooperate, even if cooperation would lead to a better outcome for both.
• Zero-Sum GameA situation where one player's gain is exactly equivalent to another player's loss, meaning the total sum of payoffs is zero.
• StrategyA complete plan of action a player will take in a game, specifying their move for every possible situation.
• PayoffThe outcome or reward a player receives at the end of a game, often represented numerically.
• RationalityThe assumption in game theory that players act to maximize their own self-interest or utility.

Careers

Roles this can lead toward

Student research

Published policy papers by One Young India delegates — every delegate leaves published under their own name.

• Analysing the Riemann Hypothesis and the approach to solve it through Zeta Function Analysis and Quantum-Inspired Random Matrix TheoryArnav Dhiman

Threads 24

Where this connects to other fields — and why it's worth knowing.

• Sexual & Reproductive Health Health

  During pregnancy, the fetus and the mother's body are secretly playing tug-of-war over nutrients. Genes the fetus got from the dad push it to grab as much as possible from the mother; genes from the mom push back to hold some in reserve. It's an evolutionary strategy game, and the battlefield is a single body.

• Civil Disobedience Law

  Talk is cheap, so how do you prove you truly believe a law is unjust? You do something costly: you break it on purpose and walk calmly to jail. The pain you're willing to take is the proof, since a faker wouldn't pay that price. Everyone watching updates their view, because you just made your conviction impossible to bluff.

• The US-China Rivalry Politics

  The most dangerous moment between two rival nations isn't when the challenger is strongest. It's when it's rising fast and can't promise to stay peaceful once it overtakes you. The current top dog is tempted to strike now, while it still can win. So 'preventive war' isn't crazy; it's a trust problem, because nobody can make a promise about the future stick.

• Adaptation & Geoengineering Environment

  Normally with climate, everyone waits for someone else to pay the cost, so nobody acts. But spraying particles to dim the sun is shockingly cheap, which flips the game upside down. Now a single country could cool the whole planet alone, like one person grabbing the thermostat for a house of eight billion.

• Strategy & Competitive Advantage Business

  Imagine two armies, and one burns the only bridge behind itself. Sounds insane, but now they can't retreat, so the enemy knows they'll fight to the end and backs off. Game theory proves this again and again: throwing away your own choices, so you literally can't chicken out, often beats keeping every option open.

• Tolerance and Pluralism Religion

  Here's a trap: if a tolerant society tolerates people who want to wipe out tolerance, those people win and tolerance dies. Philosopher Karl Popper spotted this paradox. It isn't only a question of being nice; it's a strategy problem, because being endlessly open can be the exact move that gets you destroyed.

• Terrorism and Violent Extremism Global Risks

  A suicide attacker has made retreat impossible, and that's the whole point. By throwing away any escape, they prove their threat is totally real, no bluffing possible. That unbluffable resolve is what makes it terrify people far beyond the actual harm done.

• Populism and Nationalism Politics

  When a huge group needs to unite fast, they latch onto one obvious marker, a nation, a flag, an ethnicity, that everyone can instantly recognize and rally around. It's an easy meeting point that solves teamwork. But it also locks 'us' against 'them' for good.

• Startup Funding Business

  When a startup raises way more money than it needs, that's a message, not just cash. Burning through a huge pile proves you can afford to, which scares off rivals. It's like a peacock's giant tail: wasteful on purpose, to show off strength.

• Corruption and Governance Politics

  Corruption sticks around because of a trap: you pay bribes since everyone else pays bribes, and an honest person alone just loses. Math calls this a trap equilibrium. So real reform can't be one honest official; you have to flip everyone's expectations at the same moment.

• Critical Minerals and Supply Chains Global Risks

  Taiwan makes most of the world's advanced computer chips, and that's its 'silicon shield.' Invading would wreck the very factories everyone needs, so attacking hurts the attacker too. It's the old cold-war logic of mutual destruction, rebuilt out of a supply chain instead of nukes.

• Cryptocurrency & Digital Money Economics

  With no bank in charge, why does a cryptocurrency hold together? Because attacking it just doesn't pay off. It's set up so that everyone's best move is to play honestly, a balance mathematicians call a Nash equilibrium, solving the old puzzle of how strangers who don't trust each other still agree.

• Vaccines Health

  If almost everyone around you gets a shot, a disease can't spread, so you're safe even if you skip it. That tempts each person to let others take the tiny risk while they coast for free. But when too many think that way, not enough people get protected, and the disease never quite dies out.

• The Global Debt Crisis Global Risks

  Whether a country can pay its debts is partly just what lenders believe. If they expect it to fail, they charge sky-high interest, which pushes it into failing. The fear literally creates the disaster it was afraid of.

• Landmark Constitutional Cases Law

  A supreme court has no army, yet it can overrule a president. Why does anyone listen? Because everyone expects everyone else to obey, so obeying becomes the safe move. Its power is really just a shared expectation nobody wants to break first.

• Cancer Health

  Your body is a giant deal between trillions of cells: each one agrees not to grab all the food and multiply endlessly, so the whole team can live. Cancer is just one cell that breaks the deal and starts taking everything for itself. It's a cheater walking out of a very old truce.

• World Religions Religion

  How do total strangers trust each other enough to trade and cooperate? One ancient answer: believe in a god who sees everything and punishes cheaters. If someone's always watching, cheating never pays off, so even people with no family ties can work together. It's a clever trust trick baked into belief.

• Autonomous Weapons Technology

  On the stock market, computers trading faster than any human can blink have crashed prices in seconds before anyone could stop them. Now picture that speed with weapons: machines that fire before a human can think could turn a small clash into a full war in milliseconds. It's a flash crash, but with missiles instead of money.

• Indian History History

  Gandhi's nonviolence wasn't only about being good — it was a clever move. If you stay peaceful and they beat you anyway, they look monstrous and their own side starts splitting apart. It's a strategic trap dressed up as pure principle.

• Disinformation and Elections Politics

  A liar just blurts out a fake claim in seconds. The fact-checker then has to dig up sources and carefully prove it wrong. Truth always costs more to defend than a lie costs to throw — an unfair matchup baked right into the game.

• Pandemics Science

  Once enough people are vaccinated, you personally could skip the shot and still be safe — everyone else shields you. But if everyone thinks that way, not enough people get vaccinated and the disease breaks through. The math guarantees voluntary uptake falls short.

• Antibiotic Resistance Health

  Use your most powerful antibiotic on everything, and bacteria evolve to beat it, leaving you defenseless. So the smart move is to hold it back like a secret weapon in reserve. In this game against germs, restraint beats firepower.

• Climate Change Science

  Cutting emissions helps everyone, so every country is tempted to slack off and let others do the work. One economist's fix isn't a moral lecture but a "climate club": nations that cooperate slap tariffs on those that don't. Suddenly cheating costs more than helping.

• The Psychology of Love Psychology

  Lasting love is like a game you play over and over, where knowing you'll see each other tomorrow makes being kind and loyal the smart move. Marriage and kids raise the stakes on purpose, so walking out costs a lot more. They're commitment devices that make sticking together the rational choice.