Fred has read Marcus Singer and Dee has read Alan Gewirth. What these philosophers have in common is that each attempts to 'prove' first principles in morals. This sort of approach is sometimes called ethical rationalism.

Most philosophers in England and America are skeptical about ethical rationalism, but that is exactly why I have asked Dee and John to look over the material. 

It is precisely because so many people assume some form of ethical relativism that we have to look seriously at writers who do not. Simplified forms of relativism have slipped into the common sense of many people. They cannot imagine the moral world any other way. But if we want to think critically, we have to try.