In the south live sedentary people such as the Sara, the nation's main ethnic group, whose essential social unit is the lineage. In the Sahel, sedentary peoples live side by side with nomadic ones, such as the Arabs, the country's second major ethnic group. The north is inhabited by nomads, mostly Toubous.
IN thE South livE sedeNtAry people suCh as the sAra, the natIoN's MAIN EthnIc group, whoSe Essential sOCiAl UNit is tHe lineaGe. in tHE sahel, sEdEntAry pEopLEs LiVe side by side WITh nOmAdIc OnES, suCh as the Arabs, tHe cOuNtry'S secONd mAjor eTHNIc Group. The north is inhabIted BY NoMads, mosTLy TOuboUs.