What has kept the world safe from the bomb since 1945 has not been deterrence, in the sense of fear of specific weapons, so much as it's been memory. The memory of what happened at Hiroshima.

It's a failure of national vision when you regard children as weapons, and talents as materials you can mine, assay, and fabricate for profit and defense.

And, as if nature were protecting man against his own ingenuity, the reproductive processes were affected for a time; men became sterile, women had miscarriages, menstruation stopped.

Learning starts with failure; the first failure is the beginning of education.