Half of the material included in this edition of Simmel's writings represents new translations. This includes Simmel's important, lengthy, and previously untranslated "Group Expansion and the Development of Individuality," as well as three selections from his most neglected work, "Philosophy of Money"; in addition, the introduction to "Probleme der Geschichtsphilosophie", chapter one of the "Lebensanschauung", and three essays are translated for the first time.