The author deals first with the status of ethics, arguing that there are no objective values, that morality cannot be discovered but must be made. He examines next the content of ethics, seeing morality as a function device, basically the same at all times but changing significantly in response to changes in the human condition. He sketches a practical moral system, criticizing but also borrowing from both utilitarian and absolutist views. Thirdly, the frontiers of ethics, areas of contact with psychology, metaphysics, theology, law and politics, are explored.