Was the Cuban Missile Crisis a threat to world peace?

'The Cuban Missile Crisis was never a threat to world peace' How far do you agree to this statement?

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The Cuban missile crisis only lasted 13 days but has still been considered one of the biggest threats to world peace so far. However with the readiness of each leader to negotiate and the many pacts put in place, the Missile Crisis may not have been as big of a threat as it was first believed.