On the back of this book: "This is the first book in any language to survey the new social thought that shaped the 20th century mind. Freud, Croce, Weber, Bergson, Durkheim, Sorel and Pareto are among the protagonists in the dramatic story of the genesis and interplay of modern concepts about man and the re-maiking of society." A slow, but thorough read, with plenty to brew on.