The Aryan Brotherhood, also known as the Brand or the AB, is a neo-Nazi prison gang and an organized crime syndicate which is based in the United States and has an estimated 15,000–20,000 members both inside and outside prisons. The Southern Poverty Law Center (SPLC) has characterized it as "the nation's oldest major white supremacist prison gang and a national crime syndicate" while the Anti-Defamation League calls it the "oldest and most notorious racist prison gang in the United States". According to the Federal Bureau of Investigation (FBI), the Aryan Brotherhood makes up an extremely low percentage of the entire US prison population but it is responsible for a disproportionately large number of prison murders.
The gang has focused on the economic activities which organized crime entities typically engage in, particularly drug trafficking, extortion, inmate prostitution, and murder-for-hire. The organization of its whites-only membership varies from pris