`pure race´

Everyone who has seen the John Boorman -directed movie, Deliverance `72, know the type; briefly connects to genetic disorder with a local banjo-playing boy by joining an impromptu bluegrass jam.
The film sets the tone for what lies ahead: a trip into unknown and potentially dangerous territory.
While Deliverance was well received by critics, movie was widely regarded and as one of the best films of 1972. I saw it. (In 2008, Deliverance was selected for preservation in the United States National Film Registry by the Library of Congress as being culturally, historically, or aesthetically significant.)

The notion of a `pure race´ is an absurdity.
Over the long haul, environment determines which physical features evolve in the group. Whatever genetic differences exist among the races are due to mechanisms like natural selection and sexual selection. Each race evolved according to natural processes such as natural selection but also something more, becouse graduated intelligence is collective feature.
We have facts about that. This collective feature be related to the pioneer´s hardest work to do breakthroughs.

Citation by HS/P. Jarla.