Nana Asma'u (1793–1864), from the Sokoto Caliphate in today's Nigeria, is one of many notable black women philosophers. She was a founder of the educational network "Yan Taru" (‘The Associates’), which is still active today. She wrote in the Fulfulde, Hausa and Arabic languages, and her first text had the title: ‘Warning for the Negligent and Reminder for the Intelligent Regarding the Ways of the Pious’. She argued for humility between people, and for "good relations with one’s relatives, servants, and comrades. This is shown by being cheerful with them; doing good things for them; serving them; never acting as if superior to them; consulting them in many matters; helping them financially and physically [...]"