A wonderful quote about the nature of Game Theory

Game theory is no doubt wonderful for telling stories. However, it flunks the main test of any scientific theory: The ability to make empirically testable predictions. In most real-life situations, many different outcomes — from full cooperation to near-disastrous conflict — are consistent with the game-theory version of rationality. 

by Michael Mandel, on Kahneman and Smith 2002 Nobel Prize in Economics.