Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
Cross_cultural psychology Kazakhstan A.docx
Скачиваний:
0
Добавлен:
01.05.2025
Размер:
501.62 Кб
Скачать

3.1.2 Races as a biological and social construct.

The phenotypic differences represented by the construct of “race” is the result of geographical isolation following human migrations, the long-term effect of aforementioned initial gene pool in immigrant groups, and the cultural emphasis on choice of mating within gene pools. Geographic isolation continued inbreeding especially in initially small populations responsible for some visual traits. Environmental forces also produced some selective advantages especially with skin color that people commonly associate with race. It has been argued and seems logically irrefutable, that skin color is a response to the amount and strength of sunlight in geographical regions. In the tropical areas where sunlight is especially intense a dark skin color may offer some protection and selective advantage from an evolutionary perspective. In the north where the amount of sunlight exposure is less (but needed as a source of vitamin D required for prevention of rickets), light skin conferred evolutionary advantages (Vogel & Motulsky, 1979). Today the study of deep genetic (geneographic) genealogy elicit strong support for the contention that we all came out of Africa, and that the change in skin color probably occurred as a consequence of the selective advantage of lighter skin tones in the more northern regions. In other words people with genetic mutations for light skin were more evolutionary fit in the northern regions, and therefore left offspring that survived.

Scientific evidence supports the contention that all humans are genetically brothers and sisters and racism in stereotypic expression is incredibly disingenuous (Paabo, 2001). Although such “racial” differences are very visual, the differences in gene pools are quite small compared to the genetic overlap. Differences between population groups separated by geography are also small compared to the genetic diversity existing within established population groups. For example, although blood groups vary to a small degree across geographic regions of the world, the same groups exist everywhere. The common human genetic pool ensure that you are as well served by blood transfusions from different regions and “races” as you are in getting one from your same “race” neighbor.

Nevertheless the sad story of humanity show that “race” matters as a social construct. As a social construct it is the beliefs of people about phenotypes that matter, and when informed by prejudice racism has proven to be a very negative force in the world. It has played a historical role in all societies, and influenced the direction of history as in the case of slavery and all that followed. However, the human genome project of the National Geographic journal demonstrates our very common genetic heritage, and that we were only separated in relatively recent evolutionary history.

3.1.3 The role of adaptation.

Change produced by natural selection in response to environmental pressure is called adaptation. Over time a population adapts to environmental demands or perishes. The Scandinavians in Greenland tried to bring a European agricultural society to a land that required adaptation to sea food and extreme weather conditions and they did not survive. The native Inuit population on the other hand has continued with their successful adaptation into modern times under the same harsh conditions. From the perspective of evolutionary biology adaptation is the successful adjustment of a people to environmental demands (Lewontin, 1972).

Adaptation in social science may also refer to changes that have occurred in the lifetime of people that may affect transfer of epigenetic information. Agent Orange for example has caused profound damage in Vietnam including epigenetic damage that has affected at least several generations (Larsen & Le Van, 2010). The Vietnamese have had to respond to this poisoning by social and medical programs unprecedented in world history.

It is important to remember that humans are not only shaped by the environment, but also interact with it. Global warming is an extreme example of human failure to adapt that may threaten other advantages acquired by natural selection. In more positive ways human population groups have contributed to the shaping of their environments through constant interaction and created niches that ensure survival and heritable culture. In today’s world the environment, both social and physical, are constantly changing requiring continuous adaptation to keep up with new challenges.

Соседние файлы в предмете [НЕСОРТИРОВАННОЕ]