I believe that there have been civilisations in the past that were familiar with atomic energy, and that by misusing it they were totally destroyed.
It is curious to reflect, for example, upon the remarkable legend of the Philosopher's Stone, one of the oldest and most universal beliefs, the origin of which, however far back we penetrate into the records of the past, we do not probably trace its real source.
To-day it appears as though it may well be altogether abolished in the future as it has to some extent been mitigated in the past by the unceasing, and as it now appears, unlimited ascent of man to knowledge, and through knowledge to physical power and dominion over Nature.