Hans Jonas here rethinks the foundations of ethics in light of the awesome transformations wrought by modern technology: the threat of nuclear war, ecological ravage, genetic engineering, and the like. Though informed by a deep reverence for human life, Jonas's ethics is grounded not in religion but in metaphysics, in a secular doctrine that makes explicit man's duties toward himself, his posterity, and the environment. Jonas offers an assessment of practical goals under present circumstances, ending with a critique of modern utopianism. Biografía del autor Hans Jonas was the Alvin Johnson Professor of Philosophy Emeritus at the New School for Social Research. Among his many books are The Phenomenon of Life and Philosophical Essays, both published by the University of Chicago Press.