1935-1998 20thcentury africanamericancivilrightsworkers africanamericans civilrights civilrightsmovements cleaver eldridge history historyblackpantherparty historykukluxklan(1915-) hueyp jonesboro louisiana newton politicalaspects politicalviolence politicsandgovernment racerelations racism self-defense sources southernstates unitedstates