The Ku Klux Klan is a white separatist organization in America that supports racism. They rose from the ashes of the post Civil War to spread their hatred towards minorities. At one time they were a highly active group with a membership in the thousands. Over the years they have declined in numbers but still practice their separatist movement throughout the United States.
The Handbook of Texas has published a more in-depth online biography of history of the Ku Klux Klan in Texas at http://www.tsha.utexas.edu/handbook/online/articles/view/KK/vek2.html
From the guide to the Ku Klux Klan (Amarillo, Tex. ) Records, S 1381. 1., 1921-1925 and undated, (Southwest Collection/Special Collections Library, Texas Tech University)