[4] Beiträge zur Geschichte des Materialismus, Stuttgart, 1896.
[5] See, for example, the comments upon some of Marx's statements, in the article Progrès et développement in the Devenir Social for March, 1896.
[6] For this reason I do not, like Labriola, call the theory of the factors a half-theory; nor do I like the comparison with the ancient doctrine, now abandoned in physics, physiology and psychology, of physical forces, vital forces and mental faculties.
[7] See a letter dated 21st September 1890, published in the Berlin review, Der Socialistische Akademiker, No 19, 1st October 1895. Another, dated 25th January 1894, is printed in No 20, 16th October, of the same review.
[8] He even distinguishes between the economic interpretation and the materialistic view of history. By the first term he means 'those attempts at analysis, which taking separately on the one hand the economic forms and categories, and on the other for example, law, legislation, politics, custom, proceed to study the mutual influences of the different sides of life, thus abstractly and subjectively distinguished.' By the second, on the contrary, 'the organic view of history' of the 'totality and unity of social life,' where economics itself 'is melted into the tide of a process, to appear afterwards in so many morphological stages, in each of which it forms the basis relatively to the rest which corresponds to and agrees with it.'
[9] Utopia, L. ii (Thomæ Mori angli Opera, Louvain 1566, f. 18.)
[10] 'Hateful Force rules the world and calls itself Justice.'
[11] From this point of view it is worth while to note the antipathy which leaks out in socialist writings towards Schiller, the poet of the Kantian morality æsthetically modified, who has become the favourite poet of the German middle classes.