Mutual assured destruction (MAD) is a military strategy in which two opposing military forces are powerful enough to completely destroy each other. It should help to avoid a nuclear war. This usually happens when both forces have nuclear weapons. If a state attacks another with nuclear weapons, the state attacked will potentially be able to attack back. The attacker must think that he will be destroyed with his victim if he attacks. The theory is that no state would start an attack if attacking its enemy means its own destruction.
The concept was first discussed by the futurist, theorist and military strategist Herman Kahn, the founder of the Hudson Institute, who first used the term "mutual assured destruction" in 1962 during the height of the Cold War.[1][2][3] The acronym "MAD", was used by Donald Brennan, a strategist working in Kahn's Hudson Institute, in 1962.[4] Brennan used the acronym cynically, spelling out the English word "mad" to argue that holding weapons capable of destroying society was irrational.[5]