No.410517
"We make our history ourselves, but, in the first place, under very definite assumptions and conditions. Among these the economic ones are ultimately decisive. But the political ones, etc., and indeed *even the traditions which haunt human minds also play a part,* although not the decisive one. The Prussian state also arose and developed from historical, ultimately economic, causes. But it could scarcely be maintained without pedantry that among the many small states of North Germany, Brandenburg was specifically determined by economic necessity to become the great power embodying the economic, linguistic and, after the Reformation, also the *religious difference* between North and South, and not by other elements as well (above all by its entanglement with Poland, owing to the possession of Prussia, and hence with international political relations — which were indeed also decisive in the formation of the Austrian dynastic power). Without making oneself ridiculous it would be a difficult thing to explain in terms of economics the existence of every small state in Germany, past and present, or the origin of the High German consonant permutations, which widened the geographic partition wall formed by the mountains from the Sudetic range to the Taunus to form a regular fissure across all Germany."
- Friedrich Engels, Letter to J. Bloch, September 21 1890
In other words, there's more to historical materialism than just the economic part represented through class conflict, even if it usually plays a determining role. The base shapes the superstructure but then the superstructure can react back onto the base and become determining in a given instance.