A Natural Fortress Defense Condition as a Necessary Circumstance of an Agricultural Society Born (as a Branch of the Classical Oasis Theory)

Starting from the prof. Emelyanov's paradoxes, here we present a specific theory of young agricultural societies boning. We insist that the agrarian society may appear with enough probability only in a substantially specific region, where alternative nomadic societies and cultures cannot destroy it or at least its innovations for a two-digit number of human generations. That means we should expect such occasions in poorly populated (desert) and poorly transportable landscapes and we put forward a three-stage theory. For reasons of susceptibility to external raids by armies and small enough groups of the “Asian type” using the rush-retreat tactics, the primary focus of agriculture can be formed only in the zone of maximum rest, that is, isolation (a typical “two-layer contour” - (arid) mountainous terrain - desert or semi-desert). As productivity increases, the requirements for the degree of spatial isolation of the agricultural area gradually decrease and secondary foci of agriculture with a weaker level of isolation may arise: a hollow bounded in a mountain range near the sea or a large flat river in a radically arid desert. Only at the last stage - mainly with the invention of normal firearms - agriculture can penetrate arbitrary open and forested areas that are most convenient for this.