Modeling environmental variability and network formation among pastoral nomadic households: Implications for the rise of the Mongol Empire.

We use agent-based computer simulation to test the effect of environmental conditions (available biomass/carrying capacity and environmental risk) on the development of wealth inequality and patron-client herding networks in nomadic pastoral economies. Our results show that 1) wealth inequality reac...

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Main Authors: Daniel R Shultz, Andre Costopoulos
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2019-01-01
Series:PLoS ONE
Online Access:https://doi.org/10.1371/journal.pone.0223677
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author Daniel R Shultz
Andre Costopoulos
author_facet Daniel R Shultz
Andre Costopoulos
author_sort Daniel R Shultz
collection DOAJ
description We use agent-based computer simulation to test the effect of environmental conditions (available biomass/carrying capacity and environmental risk) on the development of wealth inequality and patron-client herding networks in nomadic pastoral economies. Our results show that 1) wealth inequality reaches very high levels when carrying capacity is high and risk is low, and 2) patron-client contract herding networks increase in size and duration when carrying capacity is high and risk is low. We compare empirical data from the Mongol (1206-1368 CE) and Xiongnu (209 BCE- 48 CE) empires with simulation results to develop an explanatory mechanism for the apparent correlation between nomadic empire creation and positive environmental conditions. We argue that the internal dynamics of nomadic pastoral societies are sufficient to produce high degrees of inequality and hierarchical herding networks. Nomadic empires are more likely to form during key periods of increased biomass and decreased environmental risk.
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spelling doaj.art-170813fc7a2f4f1a9ab4622cff28018c2022-12-21T18:38:51ZengPublic Library of Science (PLoS)PLoS ONE1932-62032019-01-011410e022367710.1371/journal.pone.0223677Modeling environmental variability and network formation among pastoral nomadic households: Implications for the rise of the Mongol Empire.Daniel R ShultzAndre CostopoulosWe use agent-based computer simulation to test the effect of environmental conditions (available biomass/carrying capacity and environmental risk) on the development of wealth inequality and patron-client herding networks in nomadic pastoral economies. Our results show that 1) wealth inequality reaches very high levels when carrying capacity is high and risk is low, and 2) patron-client contract herding networks increase in size and duration when carrying capacity is high and risk is low. We compare empirical data from the Mongol (1206-1368 CE) and Xiongnu (209 BCE- 48 CE) empires with simulation results to develop an explanatory mechanism for the apparent correlation between nomadic empire creation and positive environmental conditions. We argue that the internal dynamics of nomadic pastoral societies are sufficient to produce high degrees of inequality and hierarchical herding networks. Nomadic empires are more likely to form during key periods of increased biomass and decreased environmental risk.https://doi.org/10.1371/journal.pone.0223677
spellingShingle Daniel R Shultz
Andre Costopoulos
Modeling environmental variability and network formation among pastoral nomadic households: Implications for the rise of the Mongol Empire.
PLoS ONE
title Modeling environmental variability and network formation among pastoral nomadic households: Implications for the rise of the Mongol Empire.
title_full Modeling environmental variability and network formation among pastoral nomadic households: Implications for the rise of the Mongol Empire.
title_fullStr Modeling environmental variability and network formation among pastoral nomadic households: Implications for the rise of the Mongol Empire.
title_full_unstemmed Modeling environmental variability and network formation among pastoral nomadic households: Implications for the rise of the Mongol Empire.
title_short Modeling environmental variability and network formation among pastoral nomadic households: Implications for the rise of the Mongol Empire.
title_sort modeling environmental variability and network formation among pastoral nomadic households implications for the rise of the mongol empire
url https://doi.org/10.1371/journal.pone.0223677
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