“All science, in greater or lesser degree, unquestionably reflects the tendencies of the ruling class. The more closely science attaches itself to the practical tasks of conquering nature (physics, chemistry, natural science in general), the greater is its non-class and human contribution. The more deeply science is connected with the social mechanism of exploitation (political economy), or the more abstractly it generalises the entire experience of mankind (psychology, not in its experimental, physiological sense but in its so-called philosophic sense), the more does it obey the class egotism of the bourgeoisie and the less significant is its contribution to the general sum of human knowledge. In the domain of the experimental sciences, there exist different degrees of scientific integrity and objectivity, depending upon the scope of the generalisations made. As a general rule, the bourgeois tendencies have found a much freer place for themselves in the higher spheres of methodological philosophy, of Weltanschauung. It is therefore necessary to clear the structure of science from the bottom to the top, or, more correctly, from the top to the bottom, because one has to begin from the upper stories.”
