'Complete freedom from disease and from struggle is almost incompatible with the process of living, ' Rene Dubos asserted in this classic essay on ecology and health. All the accomplishments of science and technology, he argued, will not bring the utopian dream of universal well-being, because they ignore the dynamic process of adaptation to a constantly changing environment that every living organism must face. --This text refers to an out of print or unavailable edition of this title.