One day the tough, dangerous, dirty jobs will be done by robots…invulnerable soldiers with superhuman strength and killer instinct; miners and sandhogs who can work on distant planets too deadly for humans; incorruptible judges, fearing neither political pressure or criminal vengeance; librarians with total knowledge instantly available…a chilling, yet piercingly prophetic picture of the Robot Age -when Man’s ‘slave’ machines have learned their own strength – and the weaknesses of their masters.