This volume continues a long series of books I have written, taking a
stand against various forms of relativism. My last book (Philosophy Matters,
Blackwell 2002) argued that relativism ultimately undermines philosophy
itself as an academic discipline. I now wish to look at alternatives to
relativism in the controversial field of morality. I am also continuing my
previous stress on the philosophical importance of the idea of a common
human nature, forming the basis of societies which may at first sight appear
very different.