New York Times: John Nash’s Equilibrium Concept explained (Hal Varian)

Varian says that Nash discovered a way to predict the outcome of any strategic interaction, providing the participants are rational. “..in any sort of strategic interaction, the best choice for any single player depends critcally on his beliefs about what the other players might do.” Von Neumann’s Game Theory deals with zero-sum games, whereas Nash’s equilibrium applies more broadly..