The phenomenon is known specifically as the change
blindness. This is a phenomenon where in the observer has fail to notice the
differences that has been laid out to him or her when a certain visual stimulus
is triggered or the observer is exposed to.
The Ku Klux Klan, founded in the late 1860’s, experiences three major surges in popularity promoting ideals such as white supremacy, white nationalism, Nativism, anti-immigration, and anti-communism.
The first era of Ku Klux Klan experienced a rise in popularity in the late 1800’s with the intent of overthrowing Republican state governments in the South and ensuring that newly-freed southern African Americans did not vote. In 1871 their membership was oppressed by federal law enforcement (1871 Ku Klux Klan Act signed by President Grant to combat the KKK and other white supremacy groups).
The second Ku Klux Klan group flourished nationwide in the 1920’s on the platform of pro-prohibition and anti-Catholicism and anti-Jewish feelings. They experience a diminished population in the late 1920’s (around the time of the Great Depression; a time of mass American economic hardship).
The modern-day third wave of the Ku Klux Klan came about in the late 1950’s opposing the civil rights movement. Current membership, as of 2016, amounts to an estimated 3,000-6,000 active members.
In biological terms, this effect would be<u> "diffusion".</u>
Diffusion is a spontaneous movement of particles from a territory of high focus to a zone of low fixation. (ex. tea seasoning moving from a zone of high to low fixation in heated water.)
Diffusion predominantly happens in gaseous state or inside gas atoms and fluid molecules.(e.g. The particles of 2 gases are in steady movement and if the layer isolating them is evacuated the gases will blend due to arbitrary speeds.)
