adrienne dixson amicus curiae andrew hacker anti-discrimination law bell hooks black nationalism critical legal studies critical pedagogy david roediger derrick bell discrimination eric foner essentialism feminist legal theory gender gloria ladson-billings hate speech historical revisionism john howard griffin kathleen neal cleaver liberalism mari matsuda maurice berger max weber nationalism noel ignatiev peggy mcintosh racism richard delgado self-criticism separatism social class social construction sociology storytelling toni morrison tort