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This book is a unique and up-to-date introduction to moral philosophy. Kerner defines ethics as the study of what makes life worth living and gives it meaning. Rather than cataloging how various ethical theories bear on ethical issues, he poses the central question: is objective moral knowlege possible? To address that question, he provides an exacting analysis of the works of Mill, Kant, and Sartre, and finally agrees with Sartre that such knowlege is not possible; in morality there are no objective answers but only questions direted at our deep subjectivity.