Mutual Assured Destruction is a nuclear war strategy to ensure that everyone dies. In the immortal words of WOPR, “The only winning move is not to play.” We still engage in that strategy, maintaining thousands of nuclear weapons.
We’re playing again in a different space. MAD is the new strategy for cyberwar.
http://www.theregister.co.uk/2015/04/24/pentagon_cyberwarfare_strategy/