Morphodynamic Foundations of Sumer.

Economic mechanisms behind the emergence of ancient Sumer remain unavoidably speculative and should benefit from a better understanding of their environmental context. Abundance sustaining increased social complexity during the Uruk period (c. 6,000-5,200 y BP) has been traditionally ascribed to pas...

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Main Authors: Liviu Giosan, Reed Goodman
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2025-01-01
Series:PLoS ONE
Online Access:https://doi.org/10.1371/journal.pone.0329084
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author Liviu Giosan
Reed Goodman
author_facet Liviu Giosan
Reed Goodman
author_sort Liviu Giosan
collection DOAJ
description Economic mechanisms behind the emergence of ancient Sumer remain unavoidably speculative and should benefit from a better understanding of their environmental context. Abundance sustaining increased social complexity during the Uruk period (c. 6,000-5,200 y BP) has been traditionally ascribed to pastoralism, trade, and/or resource diversity. However, contemporary agricultural surpluses are hard to explain before adoption of large-scale irrigation systems. Here we use high-resolution satellite-based topography and paleoenvironmental proxies from a new drill core at Lagash/Tell Al Hiba, together with previous geological and archaeological data, to reconstruct the morphodynamic evolution of coastal Sumer. We propose that tidal irrigation offers a plausible jumpstarting mechanism for high-yield, diversified agriculture providing an impetus for urbanization. As access to sea was restricted by delta build-up and tides shifted with the advancing deltaic coast, intensified reliance on mercurial river regimes eventually led to the expansive fluvial irrigation network of Early Dynastic city-states. By positioning coastal morphodynamics as a pivotal factor in urbanization and political ecology, we underscore the intricate interconnections between naturally evolving systems and collective human agency.
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spelling doaj-art-bce2a024cf334e1091139ad93eb143192025-08-23T05:32:29ZengPublic Library of Science (PLoS)PLoS ONE1932-62032025-01-01208e032908410.1371/journal.pone.0329084Morphodynamic Foundations of Sumer. Liviu GiosanReed GoodmanEconomic mechanisms behind the emergence of ancient Sumer remain unavoidably speculative and should benefit from a better understanding of their environmental context. Abundance sustaining increased social complexity during the Uruk period (c. 6,000-5,200 y BP) has been traditionally ascribed to pastoralism, trade, and/or resource diversity. However, contemporary agricultural surpluses are hard to explain before adoption of large-scale irrigation systems. Here we use high-resolution satellite-based topography and paleoenvironmental proxies from a new drill core at Lagash/Tell Al Hiba, together with previous geological and archaeological data, to reconstruct the morphodynamic evolution of coastal Sumer. We propose that tidal irrigation offers a plausible jumpstarting mechanism for high-yield, diversified agriculture providing an impetus for urbanization. As access to sea was restricted by delta build-up and tides shifted with the advancing deltaic coast, intensified reliance on mercurial river regimes eventually led to the expansive fluvial irrigation network of Early Dynastic city-states. By positioning coastal morphodynamics as a pivotal factor in urbanization and political ecology, we underscore the intricate interconnections between naturally evolving systems and collective human agency.https://doi.org/10.1371/journal.pone.0329084
spellingShingle Liviu Giosan
Reed Goodman
Morphodynamic Foundations of Sumer.
PLoS ONE
title Morphodynamic Foundations of Sumer.
title_full Morphodynamic Foundations of Sumer.
title_fullStr Morphodynamic Foundations of Sumer.
title_full_unstemmed Morphodynamic Foundations of Sumer.
title_short Morphodynamic Foundations of Sumer.
title_sort morphodynamic foundations of sumer
url https://doi.org/10.1371/journal.pone.0329084
work_keys_str_mv AT liviugiosan morphodynamicfoundationsofsumer
AT reedgoodman morphodynamicfoundationsofsumer