noun
zero-sum thinking
A mindset that frames situations as win-lose, where one person's gain is another's loss. Often used in economics, game theory, and everyday psychology.
ゼロサム思考に陥ると、協力の可能性を見落としがちだ。
When you fall into zero-sum thinking, you tend to overlook possibilities for cooperation.
彼のゼロサム思考のせいで、チーム内の雰囲気が悪くなった。
His zero-sum thinking made the atmosphere within the team worse.