Imagine believing that for someone else to succeed, you must fail. This way of thinking—assuming the world is a strict competition with winners and losers—is what psychologists and economists call zero-sum thinking.

It’s a powerful mental shortcut. But it often gives us a distorted picture of how the world actually works.

What Is Zero-Sum Thinking?

Zero-sum thinking happens when people treat situations as if any gain by one person automatically means a loss for another.

The term comes from zero-sum games, where the total payoff is fixed. Whatever one person gains, someone else must lose.

A simple example is the game Odds and Evens:

Two players show fingers at the same time. If the total is even, one player wins. If it’s odd, the other player wins. There is always exactly one winner and one loser.

Real-World Examples of True Zero-Sum Games

Some situations really do function this way.

Examples of genuinely zero-sum or near zero-sum situations include:

• Competitive sports matches
  One team wins, the other loses.

• Poker and most gambling games
  The money one player wins is money other players lose.

• Political elections with a single winner
  Votes gained by one candidate reduce the chances of all others.

• A single job promotion inside a firm
  If one person is promoted, everyone else is not.

• Limited scholarships or awards
  If one applicant receives the award, another applicant cannot.

• Draft picks or limited licenses
  When a scarce slot is allocated to one party, others lose access.

In these situations, the “pie” is fixed.

Non-Zero-Sum Situations

In contrast, many real-world situations allow for outcomes where everyone can benefit—or everyone can be harmed together.

A classic illustration is the Prisoner’s Dilemma, where both players can cooperate and both be better off, or both defect and both be worse off.

But non-zero-sum situations are not just theoretical.

Real-World Examples of Non-Zero-Sum Situations

Examples include:

• Economic growth and trade
  Both sides of a voluntary exchange can become better off.

• Scientific research and shared knowledge
  One person learning something does not prevent others from learning it.

• Open-source software and collaborative projects
  Contributions increase the value of the shared system for everyone.

• Education and skill development
  One person becoming more skilled does not reduce others’ ability to do the same.

• Public health improvements
  When disease is reduced, everyone benefits simultaneously.

• Creative collaboration
  Artists, writers, or developers can create outcomes that none could produce alone.

These situations allow for positive-sum outcomes, where the total benefits increase.

Examples of Zero-Sum Thinking in Everyday Life

Despite this, people frequently interpret non-zero-sum situations as if they were zero-sum:

• Wealth inequality
  “The rich get richer only because the poor get poorer.”

• Immigration
  “More resources for immigrants means fewer resources for everyone else.”

• Relationships
  “Loving more than one person means loving each person less.”

• Skill sets
  “If you have many skills, you must be worse at each one.”

• Piracy
  “Every pirated download is a lost sale.”

• Social groups and cliques
  “Stronger identity in one group necessarily weakens all others.”

The problem is not that these claims are always false.

The problem is that zero-sum thinking quietly assumes that only competitive outcomes are possible.

Why Zero-Sum Thinking Is Misleading

Zero-sum thinking collapses complex situations into a single structure:

winner versus loser.

But many real systems allow:

• mutual success,

• mutual failure,

• mixed outcomes,

• and long-term gains that expand what is available to everyone.

Humans can win together.
They can also lose together.

Yet zero-sum thinking filters those possibilities out of view.

Conclusion

Zero-sum thinking is not wrong because competition does not exist.

It is wrong when it becomes our default way of interpreting the world.

Some parts of life really are zero-sum: elections, promotions, championships, and fixed prizes.
But much of modern society—innovation, trade, education, culture, and cooperation—is fundamentally non-zero-sum.

When we mistakenly treat these domains as if they were rigid contests, we:

• exaggerate conflict,

• underestimate cooperation,

• and overlook opportunities for shared progress.

Learning to recognize when a situation is truly zero-sum—and when it is not—may be one of the most important skills for thinking clearly about politics, economics, relationships, and social life.

Not every gain requires someone else to lose.