A personal judgment on the Second World War's military legacies

Which developments from the Second World War does Clarke consider the most important and the worst?

He chooses Allied cooperation and task forces as the positive development and nuclear weapons as the negative one, citing their effect on strategic thinking.

Asked for the most important and worst developments from the Second World War, Clarke chooses the ability to work together as allies and task forces as the positive development. His negative choice is nuclear weapons. He argues that preoccupation with them has displaced good judgment and well-considered policy. This is a personal assessment of military thinking, accompanied by his hope that nuclear weapons will never be used.