Sometimes one is tempted to take refuge in cheerful fantasies and to imagine that perhaps in Mars or Venus happier and saner forms of life exist, but our frantic skill is mucking this a vain dream. Before long, if we do not destroy ourselves, our destructive strife will have spread to those planets. Perhaps, for their sake, one ought to hope that war on earth will put an end to our species before its folly has become cosmic.
Source: Has Man a future? 1961
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