This unusual diagram shows the shape that Wiltshire County Council believed the descent into nuclear war would take. Officials prepared the confidential document in the late 1970s to help train ‘community advisers’ – volunteers ready to help in time of crisis leading to a potential nuclear attack.
The chart is a reminder how quickly things could have escalated from ‘the ups and downs of everyday life’, through a bad international situation, concern among the public and in parliament, the breakdown of order as the public started to panic, and finally the attack itself.