What organization later evolved into the modern Aryan Brotherhood?

The modern Aryan Brotherhood has its roots in prison gangs that formed primarily in the United States during the 1960s. It was specifically established by white inmates in California to establish a sense of unity and protect themselves against rival gangs. The organization has evolved over time, but its foundations are closely linked to the racial ideologies and the protectionism that characterized the Ku Klux Klan, which was originally founded in the 1860s. The Ku Klux Klan promoted white supremacy and has historically engaged in acts of violence against various racial and ethnic groups.

In contrast, the other options represent different factions and gangs with varied origins and ideologies. The Bloods and Crips are primarily involved in turf wars and are focused more on street-level criminal activity, while the Folk Nation is a collection of gangs that originated primarily from Chicago and does not share the same racial ideology as the Aryan Brotherhood. Thus, the origins of the Aryan Brotherhood are more directly traced back to the ideologies and structure found within the Ku Klux Klan, making it the most appropriate connection.