▁" There ▁is ▁one ▁great ▁difficulty , ▁and ▁to ▁my ▁mind ▁an ▁ins ur mount able ▁one , ▁which ▁is ▁that ▁the ▁advoc ates ▁of ▁the ▁negro ▁civil ization ▁of ▁Egypt ▁do ▁not ▁attempt ▁to ▁account ▁for , ▁how ▁this ▁civil ization ▁was ▁lost .... ▁Egypt ▁progress ed , ▁and ▁why , ▁because ▁it ▁was ▁C au cas ian ." ▁The ▁arguments ▁regarding ▁the ▁race ▁of ▁the ▁Egypt ians ▁became ▁more ▁explicitly ▁tied ▁to ▁the ▁debate ▁over ▁sla very ▁in ▁the ▁United ▁States ▁as ▁the ▁United ▁States ▁es cal ated ▁towards ▁civil ▁war . ▁In ▁ 1 8 5 4 , ▁Jos iah ▁C . ▁N ott ▁with ▁George ▁Gl idden ▁set ▁out ▁to ▁prove : ▁" that ▁the ▁C au cas ian ▁or ▁white , ▁and ▁the ▁Neg ro ▁races ▁were ▁distinct ▁at ▁a ▁very ▁remote ▁date , ▁and ▁that ▁the ▁Egypt ians ▁were ▁C au cas ians ." ▁Samuel ▁George ▁Mort on , ▁a ▁phys ician ▁and ▁professor ▁of ▁an atom y , ▁concluded ▁that ▁although ▁" N eg ro es ▁were ▁numerous ▁in ▁Egypt , ▁but ▁their ▁social ▁position ▁in ▁ancient ▁times ▁was ▁the ▁same ▁that ▁it ▁now ▁is ▁[ in ▁the ▁United ▁States ], ▁that ▁of ▁servants ▁and ▁slaves ." ▁In ▁the ▁early ▁ 2 0 th ▁century , ▁Fl ind ers ▁Pet rie , ▁a ▁Professor ▁of ▁Egypt ology ▁at ▁the ▁University ▁of ▁London , ▁in ▁turn ▁spoke ▁of ▁a ▁N ub ian ▁queen , ▁A oh mes ▁Ne fert ari , ▁who ▁was ▁the ▁" div ine