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

natural selection landscape. Instead of traditional "hostile forces of nature", the competitive interactions among members of the same group became the most dominant evolutionary factor. According to this still controversial view, known as the "social brain" or "Machiavellian intelligence" hypothesis, more intelligent individuals were able to take advantage of other members of their group, achieve higher social status, and leave more offspring who inherited their parent's genes for larger brain size and intelligence. As a result of this runaway process, the average brain size and intelligenc e were increasing across the whole human lineage.

Also increasing were the abilities to keep track of within-group social interactions, to remember friends and their allies and enemies, and to attract and use allies. At some point, physically weaker members of the group started forming successful and stable large coalitions against strong individuals who otherwise would achieve alpha-status and usurp the majority of the crucial resources. Eventually, an egalitarian society was established. Although some of its components are well supported by data, this scenario remains highly controversial. One reason is its complexity which makes it difficult to interpret the data and to intuit the consequences of interactions between multiple evolutionary, ecological, behavioral, and social factors acting simultaneously. It is also tricky to evaluate relevant time-scales and figure out possible evolutionary dynamics.

A paper published in PLoS ONE today makes steps towards answering these challenges. The paper is co-authored by Sergey Gavrilets, a theoretical evolutionary biologist, and two computer scientists, Edgar Duenez-Guzman and Michael Vose, all from the University of Tennessee, Knoxville.

The researchers built a complex mathematical model describing the process of alliance formation which they then studied using analytical methods and large-scale num
'/>"/>

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:10/17/2014)... Copenhagen have shown for the first time how bacteria ... patients, giving them the opportunity to get tremendous insights ... The study also discovered the bacterial growth in chronic ... or slowed down by the immune cells. The researchers ... helped "suffocate" the bacteria, forcing the bacteria to switch ...
(Date:10/16/2014)... conventional thinking on how the bowel lining develops and, ... bowel cancer starts. , The researchers produced evidence that ... ,crypts, that are a feature of the bowel lining, ... cancer development, a controversial finding as scientists are still ... imaging technologies, Dr Chin Wee Tan and Professor Tony ...
(Date:10/15/2014)... N.Y. , Oct. 15, 2014 ... solutions for home and community-based care, today announced ... of implementing Sandata,s Santrax® Electronic Visit Verification™ Solution ... Services is a home health company founded in ... Texas . The study ...
Breaking Biology News(10 mins):Scientists opens black box on bacterial growth in cystic fibrosis lung infection 2Cryptic clues drive new theory of bowel cancer development 2Sandata Announces Case Study with Quality Care Services, Inc. 2
... DALLAS Jan. 30, 2014 Patients who have ... and pay closer attention to their nutritional intake, a ... published in the Journal of Investigative Medicine , ... that despite nutritional counseling over a three-month period, most ...
... expect that plants are food sources, but only after an adult ... new research published in Psychological Science , a journal of ... watching an adult put part of a plant and part of ... of age preferentially identify the plant as the food source. ...
... A Kansas State University engineer has made a breakthrough ... of mechanical and nuclear engineering, and his student researchers ... -- made of interleaved molybdenum disulfide and graphene nanosheets ... store sodium atoms and a flexible current collector. The ...
Cached Biology News:Gastric banding patients should closely monitor nutrition following surgery 2Gastric banding patients should closely monitor nutrition following surgery 3Infants know plants provide food, but need to see they're safe to eat 2Engineer brings new twist to sodium-ion battery technology 2
(Date:10/25/2014)... , October 24, 2014 ... Markets ( http://www.researchandmarkets.com/research/t5t5pd/the_global_market ) has announced the addition ... Nanotubes, Graphene And Other 2-D Nanomaterials " ... (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , ,CNTs and graphene are ... known to man, with a performance-per-weight greater ...
(Date:10/22/2014)... 21, 2014 The North American crystal ... North America with analysis and forecast of revenue. This ... is expected to reach $623.6 million by 2018, at ... Browse through the TOC of the North American crystal ... in-depth analysis provided. This also provides a glimpse of ...
(Date:10/22/2014)... Khaimah, UAE (PRWEB) October 22, 2014 ... life science and healthcare projects, announces the addition of ... DRCOG DCH to its advisory team. Dr. Siddiqui will ... team. , A graduate of University College ... was subsequently degreed in medicine in 2001. With further ...
(Date:10/22/2014)... 22, 2014 Nuvilex, Inc. (OTCQB: NVLX) – ... people worldwide are living with diabetes, with  that number ... The global market for diabetes treatments is approximately $500 ... worldwide died from pancreatic cancer.  Pancreatic cancer is the ... in the United States , and ...
Breaking Biology Technology:The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 2The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 3The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 4The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 2The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 3The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 4Dr. Yousef Siddiqui joins the Grace Century Advisory Team 2Nuvilex Brief Analyst Report: Thinking Outside the Box by BrokerBank Securities, Inc. 2
... 14 /PRNewswire-FirstCall/ - Aeterna Zentaris Inc. (NASDAQ: ... development company specialized in oncology and endocrine therapy, ... ("Keryx") (Nasdaq: KERX), has been granted orphan-drug designation ... for perifosine, Aeterna Zentaris, novel, potentially first-in-class, oral ...
... , , , ... Residents and Students now Able to Prepare, Review and Test,Knowledge of Common Medical Procedures ... Elsevier, the ... physicians,residents and students will be able to visualize and review over 300 top,medical procedures ...
... studies have uncovered a number of DNA variants associated ... variants lie outside of genes, posing a challenge to ... In a report published online today in Genome ... functional DNA element associated with prostate cancer, lending new ...
Cached Biology Technology:Aeterna Zentaris Announces Perifosine Has Received Orphan-Drug Designation for the Treatment of Neuroblastoma 2Aeterna Zentaris Announces Perifosine Has Received Orphan-Drug Designation for the Treatment of Neuroblastoma 3Aeterna Zentaris Announces Perifosine Has Received Orphan-Drug Designation for the Treatment of Neuroblastoma 4New Procedures Consult Mobile From Elsevier Enables Clinicians to View Top Medical Procedures From Mobile Devices 2New Procedures Consult Mobile From Elsevier Enables Clinicians to View Top Medical Procedures From Mobile Devices 3New Procedures Consult Mobile From Elsevier Enables Clinicians to View Top Medical Procedures From Mobile Devices 4Prostate cancer risk variant found to be in a functional DNA sequence linked with disease 2Prostate cancer risk variant found to be in a functional DNA sequence linked with disease 3
normal human fibroblasts Source: Cell Lysate Form: Ready to Use Application: Western Blotting Control...
3T3 cells (RSV-transformed) Source: Cell Lysate Form: Ready to Use Application: Western Blotting Control...
PC12 (rat phaeochromocytoma) cells Source: Cell Lysate Form: Ready to Use Application: Western Blotting Control...
Peptide-affinity Purified Polyclonal Antibody to Olfactory Receptor, Family 2, Subfamily H, Member 3...
Biology Products: