Max Weber has often been criticized for advocating a wertfrei, ethically neutral approach in the social sciences and for thereby denying to man, in the words of Leo Strauss, “any science, empirical or rational, any knowledge, scientific or philosophic, of the true value system.” On the other hand, Carl Friedrich points out that Weber's “ideal-type analysis led him to introduce value judgments into his discussion of such issues as bureaucracy.” There is some justification for both these criticisms. Indeed, a characteristic of Weber's work is that it can be and has been subjected to opposite criticisms, not only in this respect but also in others. Historians object to his disregard for the specific historical conditions under which the social phenomena he analyzes have taken place, which sometimes leads him to combine historical events that occurred centuries apart into a conception of a social system. Sociologists, in contrast, accuse him of being preoccupied with interpreting unique historical constellations, such as Western capitalism, instead of studying recurrent social phenomena which make it possible to develop testable generalizations about social structures. His methodology is attacked as being neo-Kantian, but his concept of Verstehen is decried as implying an intuitionist method. While his theories are most frequently cited in contradistinction to those of Marx, they have also been described as basically similar to Marx's.