There is a much more subtle and completely novel threat to man's survival that looms, every year more menacingly, beside that of an atomic holocaust; the cluster of world-wide problems - not only material in nature - growing at an incredible speed when viewed in historical perspective, and called by The Club of Rome the problématique humaine. In fact, we believe that even without the atomic world war, human existence as we know it is threatened if no way can be found to resolve this crisis syndrome.
p.xi; cited in: Robert C. Tucker (1995) Politics As Leadership. p. 116 - Mankind at the Turning Point, (1974)