Optimism is an alienated form of faith, pessimism an alienated form of despair. If one truly responds to man and his future, ie , concernedly and "responsibly." one can respond only by faith or by despair. Rational faith as well as rational despair are based on the most thorough, critical knowledge of all the factors that are relevant for the survival of man.
If our supreme value is the development of the Western tradition - of a man for whom the highest thing in life is man, for whom love for man, respect for man, and the dignity of man, are supreme values - then we cannot ask the question that says, "if it is better for our survival, might we drop these values?"