The classic scene from A Beautiful Mind when Nash (Russell Crowe) and his friends are discussing governing dynamics. Nash’s realization is not that of a Nash Equilibrium, but rather the classic view of Adam Smith (everyone doing what’s best for themselves) is harmful compared to if they just work together for the common good. It can be a bit confusing since the Nash Equilibrium is not that people should work together for the great good, but this is still a good introduction to a lesson game theory because it helps introduce why it might be harmful for everyone to only do what’s in their own best interest.