make this shorter and pharaphrase this.Mutually Assured Destruction (MAD) is a doctrine where both nuclear-armed countries agree to retaliate with overwhelming force if attacked, ensuring both parties would be destroyed. It was developed during the Cold War to deter conflict between the United States and the Soviet Union by ensuring the devastation of both nations if nuclear war ever broke out, thereby promoting stability and preventing large-scale warfare.

Mutually Assured Destruction (MAD) is a strategy where two nations with nuclear weapons promise to respond with immense force if attacked, guaranteeing mutual destruction. The doctrine was created in the Cold War era to discourage conflict between the United States and the Soviet Union. Its aim was to maintain stability and prevent massive wars by showcasing the potential devastation resulting from nuclear war.