"We go lightheartedly on our way, never thinking that by a careless word or two we may have altered the whole course of human lives, for some person will take our advice and use it."

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Often in evolutionary processes a species must adapt to new conditions in order to survive. Today the atomic bomb has altered profoundly the nature of the world as we know it, and the human race consequently finds itself in a new habitat to which it must adapt its thinking.

— Albert Einstein