Adaption.... IT is adapting to the enviroment.. If you had poison ivy for grass. Your body would eventually become immune to it... It is not like we would change in to different type of life form.
The theory of evolution says that all forms of life are descended from simpler forms, such as humans coming from monkeys. That means that there has to have been a lot of animals halfway in between, called transitional species. There are no such animals now, nor is there any evidence of these animals in the past. Scientists claim a lot of fossils are transitional, but if you ever look closely, their claims are always shaky.
What you are arguing is Jean-Baptiste Lamarck 1809 pre-evelotion theory, which has been disproven long ago.
Giraffes don't have long necks because they stretched their necks and thus passed their stretched necks to their children, rather, the Giraffes that didn't have long necks, couldn't eat, and thus died off, eliminating that attribute from the gene pool.
When adaption is carried to future generations and thus is genetically encoded, it is by definition, evolution. Over millions of generations combined with isolation, this results in a different species.
This theory says that anyone less privileged should be dominated or killed. The Nazis were some of the best evolutionist, because they dominated the others so thoroughly.
the NAZI mentality stems from a mentality that was based on evolution and was in a less extreme way practiced all over the world, including the USA. Its called Eugenics.