It appears that the answer to your question continues to be a mystery,
as is evident in this article's explanation on the subject:
"The shape of Asian eyes is not appreciated in Asia today. If it is
admired elsewhere, why is it not found in other parts of the world? Of
course it is also characteristic of the Bushmen of southern Africa,
and other Africans have slanted eyes. It probably diffused by sexual
selection from northeastern Asia to Southeast Asia, where it is not at
all cold. It is also possible that the trait may have originated more
than once in the course of human evolution. If it first appears that
climatic factors were most important in the creation of racial
differences, we should not neglect sexual selection as a possible side
explanation. Unfortunately, the genetic bases for these adaptations
are not well known; each of these traits is very complex. Considerable
local variation in tastes further complicates the matter."
"Race, Genetics and History"
http://www.raceandhistory.com/historicalviews/rgh.htm
Regards;
Tutuzdad - Google Answers Researcher |
