In regard to the tendency to reconstruct a materialistic philosophy of history, substituting an omnipresent Matter for an omnipresent Idea, it suffices to re-assert the impossibility of any such construction, which must become merely superfluous and tautologous unless it abandoned itself to dogmatism. But there is another error, which is remarked among the followers of the materialistic school of history, and which is connected with the former, viz., to anticipate harm not only in the interpretation of history but also in the guidance of practical activities. I refer to the teleological tendencies (abstract teleology), which also Labriola opposes with a cutting attack. The very idea of _progress_, which has seemed to many the only law of history worth saving out of the many devised by philosophical and non-philosophical thinkers, is by him deprived of the dignity of a law, and reduced to a sufficiently narrow significance. The idea of it, says Labriola, is 'not only empirical, but always incidental and hence limited': progress 'does not influence the sequence of human affairs like destiny or fate, nor like the command of a law.' History teaches us that man is capable of progress; and we can look at all the different series of events from this point of view: that is all. No less incidental and empirical is the idea of _historical necessity_, which must be freed from all remnants of rationalism and of transcendentalism, so that we see in it the mere recognition of the very small share left in the sequence of events, to individuals and personal free will.