Definiția și Sensul lui "zero-sum game"

What is the origin of the idiom "zero-sum game" and when to use it?

The idiom "zero-sum game" originated in game theory, where it describes a game in which the total amount of winnings and losses is always zero. The phrase is often used more broadly to describe situations where there is a fixed amount of resources or opportunities, and any gain by one person or group must come at the expense of another.