The article examines the socio-economic causes of the outcome of the Spanish Civil War (1936-1936), which, as opposed to the Russian Civil War, resulted in the victory of the “Whites”. Choice of Spain as the object of comparison with Russia is justified not only by similarity of civil wars occurred in the two countries in the XX century, but also by a large number of common features in their history. Based on statistical data on the changes in economic well-being of different strata of Spanish population during several decades before the civil war, the authors formulate the hypothesis according to which the increase of real incomes of Spaniards engaged in agriculture is “responsible” for their conservative political sympathies. As a result, contrary to the situation in Russia, where the peasantry did not support the Whites, in Spain the peasants’ position predetermined the outcome of the confrontation resulting in the victory of the Spanish analogue of the Whites. According to the authors, the possibility of stable increase of Spanish peasants’ incomes was caused by the nation’s non-involvement in World War I and also by more limited, compared to Russia and some other countries, spending on creation of heavy (primarily military-related) industry in Spain.