According to the book “Thinking strategically” from Avinash K. Dixit and Barry J.Nalebuff, strategic thinking is the art of outdoing an adversary, knowing that the adversary is trying to do the same. Game theory is the science of strategic thinking.
Maybe this definition of strategic thinking is too narrow, I think for example that fighting climate change requires strategic thinking, even though it doesn’t involve an adversary trying to do the same. This disagreement apart, the book is very useful. It presents simple and not so simple examples of game theory which really enlighten us on the way our societies practically work.


