II. In the Introductions to the Dialogues there have been added some essays on modern philosophy, and on political and social life. The chief subjects discussed in these are Utility, Communism, the Kantian and Hegelian philosophies, Psychology, and the Origin of Language. (There have been added also in the Third Edition remarks on other subjects. A list of the most important of these additions is given at the end of this Preface.)
