Abstract
In his introduction Professor Edwards remarks that he does not believe that the work will be condemned "as either dull or timid", whatever else may be said about it. And, in the main, he is right in this belief. It is hardly feasible of course to maintain a uniform policy of scintillating provocativeness when one is summarizing the ideas of some rather obscure thinkers or dealing with some highly technical matter. But on controversial issues articles are often lively and make no pretense of Olympian detachment. Some articles, even though useful, may be a bit flat. But the work as a whole certainly does not give this impression.