Mexicans are the majority of the prisons just like they pretty much are eveywhere. The mexican mafia pretty much runs shit there. Next you got the whites. Your average peckerwood is just like your average mex. Just a #. The Aryan brotherhood is a whole diff story. They pretty much are the most structured and powerful/ruthless gang in prison regaurdless of their #'s. They are def the last group to fuck with. Blacks are just #'s and are not very structured. They get the least respect in their and pretty much stick to their own. Many of the mex and white gang members will use them as muscle to take care of business and let them take the rap for it.