NIMBioS Interdisciplinary Seminar
 3:30* p.m., Tuesday, Nov. 16, 2010

Nov.16 Seminar
Dr. Peter Turchin
Dept. of Ecology and Evolutionary Biology, Dept. of Mathematics
University of Connecticut

"The rise of complex human societies as a major evolutionary transition"

3:30* p.m. - 5 p.m.
Tuesday, Nov. 16, 2010
NIMBioS, Blount Hall, 1534 White Ave.

*Join us for refreshments in the NIMBioS Lobby at 3 p.m.

If you are interested in meeting with Dr. Turchin while he is visiting UTK, please email Sergey Gavrilets, NIMBioS Associate Director for Scientific Activities.

Click here for a .pdf flyer of the seminar.

For more information about the seminar and other upcoming seminars at NIMBioS, visit our website.

Watch the Video
Click the picture to view Dr. Peter Turchin explaining cliodynamics and how large complex societies arise.
How Do Complex Societies Arise?
Peter Turchin

The social life of humans, unlike that of bees or ants, cannot be explained by genes alone. What is the glue that holds large groups of unrelated individuals together? How do societies evolve from simple, small-scale ones to large-scale complex ones?

Ultrasociality, the ability of humans to form cooperating societies consisting of huge numbers of genetically unrelated individuals, remains a largely unresolved puzzle. It is a puzzle that has warranted the attention of Dr. Peter Turchin, a professor of ecology and evolutionary biology and mathematics at the University of Connecticut, who has developed a mathematical approach to investigate the question.

"The great majority of humans today live in large-scale complex societies organized as states," Turchin explains. "Complex societies exist only on a basis of extensive cooperation among large numbers of individuals. And yet standard theories in both social science and evolutionary biology cannot explain why this happens."

Turchin applies the theory of multilevel selection to help explain human ultrasociality. Using a key mathematical result in multilevel-selection theory called the Price equation, Turchin has developed a model that describes the conditions under which human ultrasociality evolves. This mathematical result is then fleshed out with agent-based models solved on the computer. Empirical tests of the model indicate that large states should arise in regions where culturally very different people are in contact and where warfare is particularly intense.

The author of five books, Turchin has developed a field of research he calls "cliodynamics," which applies a dynamical systems approach to the study of history. Cliodynamics combines mathematical models and analyses of quantitative data to explain the processes and mechanisms that influence historical dynamics. Turchin is currently developing tests of one of his theories to American society since its independence in 1783. Using historical quantitative data on such processes as demographic growth and social stratification, the theory explains why complex human societies experience long-term oscillations in economic inequality and political instability.


Turchin will address the question of how complex human societies arise in a talk at 3:30 p.m., Nov. 16, 2010, at the National Institute for Mathematical and Biological Synthesis (NIMBioS), located on the University of Tennessee, Knoxville campus. Turchin's talk is a part of the biweekly NIMBioS Interdisciplinary Seminar Series, which is held every other Tuesday during the academic year. Seminar speakers focus on their research initiatives at the interface of mathematics and many areas of the life sciences. Each seminar begins with light refreshments starting at 3 p.m. NIMBioS is located on the 4th floor of Blount Hall,
1534 White Ave.  


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The National Institute for Mathematical and Biological Synthesis (NIMBioS) brings together researchers from around the world to collaborate across disciplinary boundaries to investigate solutions to basic and applied problems in the life sciences. NIMBioS is funded by the National Science Foundation in collaboration with the U.S. Department of Homeland Security and the U.S. Department of Agriculture, with additional support from The University of Tennessee, Knoxville.

NIMBioS is located on the Univ. of Tennessee, Knoxville, campus
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