This paper is a study of the major influence of the German philosophy, Krausism, in the writings of Benito Perez Galdds. The study is an analysis of the effects of this ideology on Spain and her people, as illustrated in the works of the most representative writer of the nineteenth century in that country. Also included is a discussion of historical incidents of the period which is necessary to place the acceptance of both this philosophy and the works of Perez Galdos in its proper perspective.