Navigation Links
Egalitarian revolution in the Pleistocene?
Date:10/3/2008

erical simulations. The model focuses on a group of individuals who vary strongly in their fighting abilities. If all conflicts were exclusively between pairs of individuals, a hierarchy would emerge with a few strongest individuals getting most of the resource. However, there is also a tendency (very small initially) for individuals to interfere in an ongoing dyadic conflict thus biasing its outcome one way or another. Positive outcomes of such interferences increase the affinities between individuals while negative outcomes decrease them. Naturally, larger coalitions have higher probability of winning a conflict.

Gavrilets and colleagues identified conditions under which alliances can emerge in the group: increasing group size, growing awareness of ongoing conflicts, better abilities in attracting allies and building complex coalitions, and better memories of past events.

Most interestingly, the model shows that the shift from a group with no alliances to one or more alliances typically occurs suddenly, within several generations, in a phase-transition like fashion. Even more surprisingly, under certain conditions (which include some cultural inheritance of social networks) a single alliance comprising all members of the group can emerge in which resources are divided evenly. That is, the competition among non-equal individuals can paradoxically result in their eventual equality.

Gavrilets and colleagues argue that such an "egalitarian revolution" could also follow a change in the mating system that would increase father-son social bonds or an increase in fidelity of cultural inheritance of social networks. Interestingly, the fact that mother-daughter social bonds are often very strong in apes suggests (everything else being the same) that females could more easily achieve egalitarian societies.

The model also highlights the importance of the presence of outsiders (or "scapegoats") for stability of small alliances. The researchers s
'/>"/>

Contact: Sergey Gavrilets
gavrila@tiem.utk.edu
Public Library of Science
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Old developmental pathways spawn revolutionary evolutionary changes
2. Systems Biology poised to revolutionize the understanding of cell function and disease
3. Now is Africas turn for a green revolution, global experts say
4. Alliance for a Green Revolution in Africa commits 180M to revive farmers depleted soils
5. M2SYS Introduces Revolutionary Biometric Artificial Intelligence Technology to Significantly Reduce Fingerprint Software False Reject Rates
6. Biosensing nanodevice to revolutionize health screenings
7. Revolutionary CO2 maps zoom in on greenhouse gas sources
8. Fluorescent nano-barcodes could revolutionize diagnostics
9. Revolution in rain forest monitoring with MacArthur grant
10. New electrostatic-based DNA microarray technique could revolutionize medical diagnostics
11. Revolutionary chefs? Not likely, shows physics research
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/5/2014)... PROVO, Utah , Dec. 4, 2014  Tute ... has raised $2.3 million in Series A1 funding led ... angel investors also participated in the investment round. ... as the healthcare community adopts next-generation sequencing and seeks ... disease," said Reid Robison , MD MBA, and ...
(Date:11/21/2014)... 18, 2014 According to a ... Systems (Video, RFID, Access Control, Intrusion Detection, Parking Management, ... Government), Component Service Geography - Global Forecasts to 2020", ... projected to be around $25 Billion in 2014 and ... at a CAGR of 8.69%. Browse 116 ...
(Date:11/21/2014)... JOSE, Calif. , Nov. 20, 2014   ... global leader in microcontroller (MCU) and touch technology solutions, ... digital temperature sensors with the widest V cc ... delivers higher temperature accuracy and faster I 2 C ... registers and serial EEPROM memory making them ideal for ...
Breaking Biology News(10 mins):Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 2Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 3Industrial Security Systems Market Worth $38 Billion by 2020 2Industrial Security Systems Market Worth $38 Billion by 2020 3Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 2Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 3Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 4
... movementfrom the blink of an eye to running a marathonnerve ... cells rely on tiny molecular motors to transport chemical messengers ... process, which scientists are still trying to understand. A new ... of the puzzle. The study, published in the April ...
... in French . Montreal, May 25, 2011 ... do it, too. But when it comes to securing a mate ... A group of scientists from Simon Fraser University, Concordia ... the key to reproductive success when males outnumber females. The ...
... been tracked inside a living human cell and may lead ... Professor Lloyd Hollenberg from the University of Melbourne,s School ... first time a single atom encased in nanodiamond has been ... a living human cell. "It is exciting to see ...
Cached Biology News:Syracuse University scientists discover new hitch to link nerve cell motors to their cargo 2Mating rivalry among furred and feathered: Variety is spice of life 2Quantum sensor tracked in human cells could aid drug discovery 2
(Date:12/19/2014)... 19, 2014 Charm Sciences is pleased ... the Detection of Aflatoxin M1 in raw commingled milk ... third party validation. The peer reviewed report of the ... Institute for Agricultural and Fisheries Research (ILVO-T&V) has been ... Aflatoxin B1, the most toxic aflatoxin and a known ...
(Date:12/19/2014)... BURLINGTON, Mass. , Dec. 19, 2014 ... biomaterial market will grow at a 12 percent compound ... a result of the aging population and the increasing ... Latin America will also spur demand ... results of dental implant and periodontal treatments. ...
(Date:12/19/2014)... Ed Bilsky, Ph.D., vice president for Research and ... the Neurosciences (CEN), and professor of pharmacology at the ... member of the prestigious Dana Alliance for Brain Initiatives ... receive this honor. , The Dana Alliance ... Foundation. Its mission is to advance public education ...
(Date:12/19/2014)... With only 2 weeks left of 2014, ... Biohit products . The product specials include Buy 1 ... Trade-in Program, and free pipette tips. , Sartorius mLINE ... world. They are ideal for lab technicians performing long ... ,     Full volume range of 0.1 uL to 10 ...
Breaking Biology Technology:Charm Sciences Achieves Independent Validation of First 15 Minute Quantitative Screening Method for Aflatoxin M1 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 3UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 2UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 3Major Pipette Distributor Pipette.com Announces Sartorius Year End Specials 2
... Project supported by Department of Defense program , ... laser manufacturer, recently demonstrated 65 percent total power conversion ... conference in Albuquerque, N.M. This step toward the eventual ... Defense Advanced Research Projects Agency s Super ...
... , ,STURTEVANT, Wis. A third company has ... for Advanced Technology and Innovation, Inc. , or CATI. ... its flexible, raised-pavement marking system, according to its executive ... installed on most state and interstate highways to designate ...
... has formed a scientific advisory board to guide ... , ,Announced last week by President and Chief Executive ... of distinguished scientific leaders who will help supplement the ... will also assist the company as it designs, conducts ...
Cached Biology Technology:Alfalight increases laser efficiency for DOD program 2Quintessence Biosciences forms cancer therapeutic advisory board 2
BD BioCoat Osteologic Coverslips that have been sterilized by ETO gas. Coating : Osteologic&trade ,Thickness : 0.16 mm ,Diameter : 12.7 mm ,Gridded : No ...
Mouse monoclonal antibody to ACP2 - acid phosphatase 2, lysosomal...
... a group of enzymes involved in matrix ... metalloproteinase family ten exist in soluble form ... MT1-MMP, MT2-MMP, MT3-MMP also known as MMP14, ... domain anchoring them to the cell surface. ...
...
Biology Products: