Results 1 to 2 of 2

Thread: Understanding Human Races: the Retreat of Neutralism

  1. #1
    Progressive Collectivist
    "Friend of Germanics"
    Skadi Funding Member

    Agrippa's Avatar
    Join Date
    Nov 2003
    Last Online
    Monday, January 31st, 2011 @ 09:22 PM
    Ethnicity
    German
    Subrace
    Atlantid
    Location
    Asgard
    Gender
    Politics
    Progressive Collectivist
    Religion
    Catholic
    Posts
    6,968
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    11
    Thanked in
    11 Posts

    Understanding Human Races: the Retreat of Neutralism

    Understanding human races: the retreat of neutralism.
    Henry Harpending
    Discussion and debate about human races has been dominated for decades by neutral theory and statistics. Since this literature never posed a real question, it has never produced an answer. Lewontin's 1972 paper with its claim that a value of 1/8 of a statistic like Fst is “small” and that this means that human race differences are insignificant is a staple of our textbooks. Recently geneticists have had a closer look and pointed out that Fst of 1/8 describes differences among sets of half sibs and few claim that half sibs are insignificantly related. Anthony Edwards has shown that the significance of differences is in the correlation structure of a large number of traits, again denying the Lewontin assertion that human differences are small. Alan Templeton in 1998 claimed that human races were less differentiated that races of some other large mammals, but he compared human nuclear DNA statistics with statistics from mtDNA in the other species. An appropriate comparison shows that human are more, not less, differentiated than other large mammal species. Since neutral differences are a passive
    record of demographic history they are not very significant for issues of functional biology. Newly available data sources allow us to study the natural selection of race differences instead of their drift. It appears that there is a lot of ongoing evolution in our species and the loci under strong selection on different continents only partially overlap. Human race differences may be increasing rapidly.

    Source:
    http://dienekes.blogspot.com/2007/03...abstracts.html

    and

    Acceleration of adaptive evolution in modern humans.
    J. Hawks and G. Cochran
    Humans vastly increased in numbers during the past 40,000 years. Recent surveys of human genomic variation have suggested a large surplus of recent positive selection, indicated by excess linkage disequilibrium and skewed SNP frequency spectra. We applied estimates of prehistoric and historic population sizes to estimate the importance of population growth in explaining the number of recent adaptive mutations. Our estimates are consistent with genomic evidence in suggesting that the rate of generation of positively selected genes has increased as much as a hundredfold during the past 40,000 years.

    Do skeletal features reflect this genomic evidence of selection? Under positive
    selection, rapid appearance of new variants during the terminal Pleistocene and early
    Holocene would cause maximal phenotypic change during the last 2000-4000 years. We compared original and published series of Holocene cranial data from Europe, Jordan, Nubia, South Africa, and China, in addition to Late Pleistocene samples from Europe and West Asia, to test the hypothesis that the genomic acceleration in positive selection correlates with phenotypic evolution during this time period. A constellation of features in the face and cranial vault, notably including endocranial volume, changed globally during this time period and documents common patterns of selection in different regions. Holocene changes were similar in pattern and chronologically faster than those at the archaic-modern transition, which themselves were rapid compared to earlier hominid evolution. In genomic and craniometric terms, the origin of modern humans was a minor event compared to more recent evolutionary changes.
    Compare with:
    http://forums.skadi.net/concept_race...ns-t90768.html
    Magna Europa est patria nostra
    STOP GATS! STOP LIBERALISM!

  2. #2
    Funding Member
    "Friend of Germanics"
    Skadi Funding Member


    Join Date
    Sep 2003
    Last Online
    Friday, September 5th, 2008 @ 06:36 AM
    Subrace
    Nordid
    Country
    United States United States
    State
    California California
    Gender
    Family
    Married
    Posts
    4,097
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    17
    Thanked in
    16 Posts

    Re: Understanding human races: the retreat of neutralism

    The thing about Out of Africa is that if it is true, then evolution has progressed at light speed during these last 60,000 years. We do have geographic subspecies. These can be defended in terms of biology. If we take OoA and biologic subspecies together, then evolution has progressed very rapidly indeed for Homo sapiens.

Similar Threads

  1. Do Some Human Races Have Different Internal Organs?
    By Rumil in forum Bio-Anthropology & Human Variation
    Replies: 2
    Last Post: Sunday, February 5th, 2017, 01:14 PM
  2. Replies: 3
    Last Post: Wednesday, June 29th, 2005, 02:00 AM
  3. The Concept of Human Races: Uses and Problems
    By Frans_Jozef in forum Bio-Anthropology & Human Variation
    Replies: 0
    Last Post: Tuesday, December 7th, 2004, 08:30 PM
  4. Replies: 1
    Last Post: Saturday, April 17th, 2004, 11:41 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •