Study suggests warfare was responsible for the boom-bust cycles of Neolithic societies SciReports
; thus cells with higher carrying capacities are preferred.$$\begin{aligned} E_j=\left\{ \begin{array}{ll} 1 &{} \quad \text {if cell } j \text { is empty} \\ p_E &{} \quad \text {if cell } j \text { is occupied} \end{array} \right. \end{aligned}$$quantifies willingness to attempt to enter an occupied cell, which triggers conflict with its inhabitants. In the pure climate model, this parameter is set to 0, thus, no conflict occurs.
In the warfare model version, selecting an already occupied cell as migration target gives rise to conflict, which will eventually result in the defeat and elimination of either the previous occupants of the cell , or of the attackers. In the main model variant, the winner of such a confrontation has a chance of becoming militarized, converting to “aggressors”. Model parameterdetermines the probability of the winner of a conflict converting to an aggressor.
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