Exploration and exploitation in the macrohistory of the pre-Hispanic Pueblo Southwest

Climate change can rapidly undermine ritual mechanisms that enhance social consensus, as shown for the Pueblo Southwest. Cycles of demographic and organizational change are well documented in Neolithic societies, but the social and ecological processes underlying them are debated. Such periodicities are implicit in the “Pecos classification,” a chronology for the pre-Hispanic U.S. Southwest introduced in Science in 1927 which is still widely used. To understand these periodicities, we analyzed 29,311 archaeological tree-ring dates from A.D. 500 to 1400 in the context of a novel high spatial resolution, annual reconstruction of the maize dry-farming niche for this same period. We argue that each of the Pecos periods initially incorporates an “exploration” phase, followed by a phase of “exploitation” of niches that are simultaneously ecological, cultural, and organizational. Exploitation phases characterized by demographic expansion and aggregation ended with climatically driven downturns in agricultural favorability, undermining important bases for social consensus. Exploration phases were times of socio-ecological niche discovery and development.

[1]  Timothy A. Kohler,et al.  The Better Angels of their Nature: Declining Violence through Time Among Prehispanic Farmers of the Pueblo Southwest , 2014, American Antiquity.

[2]  Timothy A. Kohler,et al.  Sunk‐Cost Effects and Vulnerability to Collapse in Ancient Societies1 , 2003, Current Anthropology.

[3]  D. Joanes,et al.  Comparing measures of sample skewness and kurtosis , 1998 .

[4]  R. Towner.  Archeological dendrochronology in the southwestern united states , 2002 .

[5]  R Core Team,et al.  R: A language and environment for statistical computing. , 2014 .

[6]  P. Gilman.  Architecture as Artifact: Pit Structures and Pueblos in the American Southwest , 1987, American Antiquity.

[7]  Tim Kerig,et al.  Regional population collapse followed initial agriculture booms in mid-Holocene Europe , 2013, Nature Communications.

[8]  Roger Bivand,et al.  Bindings for the Geospatial Data Abstraction Library , 2015 .

[9]  R. Lightfoot.  Archaeology of the house and household , 1994 .

[10]  J. Dean.  Time, Space, and Transition in Anasazi Prehistory. Michael S. Berry. University of Utah Press, Salt Lake City, 1982. xi + 147 pp., illus., biblio., index. $20.00 (cloth). , 1985, American Antiquity.

[11]  Richard Wilshusen.  The Relationship Between Abandonment Mode and Ritual Use in Pueblo I Anasazi Protokivas , 1986 .

[12]  A. Kidder.  SOUTHWESTERN ARCHEOLOGICAL CONFERENCE. , 1927, Science.

[13]  Richard Van Ness Ahlstrom,et al.  The interpretation of archaeological tree-ring dates , 1985 .

[14]  J. Coltrain,et al.  The stable and radio-isotope chemistry of southeastern Utah Basketmaker II burials: dietary analysis using the linear mixing model SISUS, age and sex patterning, geolocation and temporal patterning , 2013 .

[15]  P. Richerson,et al.  Culture and the Evolutionary Process , 1988 .

[16]  R. Kyle Bocinsky,et al.  A 2,000-year reconstruction of the rain-fed maize agricultural niche in the US Southwest , 2014, Nature Communications.

[17]  Lynne Sebastian.  The Chaco Anasazi: Sociopolitical Evolution in the Prehistoric Southwest , 1994 .

[18]  Colin Renfrew,et al.  Peer Polity Interaction and Socio-political Change , 1986 .

[19]  Timothy A. Kohler,et al.  Long and spatially variable Neolithic Demographic Transition in the North American Southwest , 2014, Proceedings of the National Academy of Sciences.

[20]  J. Pruetz.  Uniquely Human ? A Reply to Zoon Politikon : The Evolutionary Origins of Human Political Systems , 2017 .

[21]  J. Dean,et al.  Human Behavior, Demography, and Paleoenvironment on the Colorado Plateaus , 1985, American Antiquity.

[22]  J. March.  Exploration and exploitation in organizational learning , 1991, STUDI ORGANIZZATIVI.

[23]  Michael X Cohen,et al.  Harnessing Complexity: Organizational Implications of a Scientific Frontier , 2000 .

[24]  J. Hancock,et al.  On the use of Ripley's K-function and its derivatives to analyze domain size. , 2009, Biophysical journal.

[25]  H. Akaike.  A new look at the statistical model identification , 1974 .

[26]  G. Gumerman,et al.  The Colorado Plateaus: Cultural Dynamics and Paleoenvironment , 1979, Science.

[27]  John H. Holland,et al.  Adaptation in Natural and Artificial Systems: An Introductory Analysis with Applications to Biology, Control, and Artificial Intelligence , 1992 .

[28]  R. G. Matson.  The nutritional context of the Pueblo III depopulation of the northern San Juan: Too much maize? , 2016 .

[29]  K. Strimmer,et al.  Statistical Applications in Genetics and Molecular Biology High-Dimensional Regression and Variable Selection Using CAR Scores , 2011 .

[30]  C. Daly,et al.  Physiographically sensitive mapping of climatological temperature and precipitation across the conterminous United States , 2008 .

[31]  Michelle Hegmon,et al.  Risk Reduction and Variation in Agricultural Economies: A Computer Simulation of Hopi Agriculture , 1989 .

[32]  Lynne Sebastian.  Living and Leaving: A Social History of Regional Depopulation in Thirteenth-Century Mesa Verde , 2015 .

[33]  H. Gintis,et al.  The Evolutionary Origins of Human Political Systems by Herbert Gintis , Carel van Schaik , 2015 .

[34]  M. Berry.  Time, Space and Transition in Anasazi Prehistory , 1982 .

[35]  Harold C. Fritts,et al.  The International Tree-Ring Data Bank: an enhanced global database serving the global scientific community , 1997 .

[36]  L. Cordell,et al.  Southwest Archaeology in the Twentieth Century , 2005 .

[37]  R. Kyle Bocinsky.  Functions to Automate Downloading Geospatial Data Available fromSeveral Federated Data Sources , 2016 .

[38]  B. Ripley.  Modelling Spatial Patterns , 1977 .

[39]  Timothy A. Kohler,et al.  Leaving Mesa Verde: Peril and Change in the Thirteenth-Century Southwest , 2010 .

[40]  H. Gintis,et al.  Uniquely Human? A Reply to Zoon Politikon: The Evolutionary Origins of Human Political Systems , 2015 .