What shaped the West?

“Though most proponents of expansion never directly used the term Social Darwinism, it was the commonly understood intellectual underpinning of their theories. These theories devolved and spread into popular entertainments, literature, and journalism, creating a mythology of the virile American hero vanquishing the uncivilized brutes who would prevent our manifest destiny.”

-Jonathan Turley

http://en.wikipedia.org/wiki/Social_Darwinism