"I think all of you know there is no adequate defense against massive nuclear attack"

This quote by George Wald is a plain suggestion of the harmful power of nuclear weapons. It indicates that no matter just how much we prepare, there is no way to properly protect ourselves versus a nuclear attack. This is due to the fact that the large magnitude of the damage triggered by a nuclear weapon is so great that it would be difficult to protect versus it. The quote also acts as a cautioning to the world about the dangers of nuclear weapons and the requirement to take steps to minimize the risk of nuclear war. Wald's words are a suggestion that we need to take actions to ensure that nuclear weapons are never ever used, and that we should interact to lower the danger of nuclear war.