bach ' s ▁philosophy , ▁in ▁which ▁it ▁refers ▁both ▁to ▁the ▁nature ▁of ▁each ▁human ▁and ▁of ▁human ity ▁as ▁a ▁whole . ▁ ▁However , ▁in ▁the ▁sixth ▁Th eses ▁on ▁Feuer bach ▁( 1 8 4 5 ), ▁Marx ▁critic izes ▁the ▁traditional ▁conception ▁of ▁human ▁nature ▁as ▁a ▁species ▁which ▁inc arn ates ▁itself ▁in ▁each ▁individual , ▁instead ▁arg uing ▁that ▁human ▁nature ▁is ▁formed ▁by ▁the ▁tot ality ▁of ▁social ▁relations . ▁Thus , ▁the ▁whole ▁of ▁human ▁nature ▁is ▁not ▁understood , ▁as ▁in ▁classical ▁ideal ist ▁philosophy , ▁as ▁permanent ▁and ▁universal : ▁the ▁species - be ing ▁is ▁always ▁determined ▁in ▁a ▁specific ▁social ▁and ▁historical ▁formation , ▁with ▁some ▁aspects ▁being ▁bi ological . ▁ ▁The ▁sixth ▁th esis ▁on ▁Feuer bach ▁and ▁the ▁determ ination ▁of ▁human ▁nature ▁by ▁social ▁relations ▁The ▁sixth ▁of ▁the ▁Th eses ▁on ▁Feuer bach , ▁written ▁in ▁ 1 8 4 5 , ▁provided ▁an ▁early ▁discussion ▁by ▁Marx ▁of ▁the ▁concept ▁of ▁human ▁nature . ▁It ▁states : ▁ ▁Feuer bach ▁resol ves ▁the ▁ess ence ▁of ▁religion ▁into ▁the ▁ess ence ▁of ▁man ▁[ m ensch liches ▁W esen ▁= ▁‘ human ▁nature ’ ]. ▁But ▁the ▁ess ence ▁of ▁man ▁is ▁no ▁abstra ction ▁inher ent ▁in ▁each ▁single ▁individual . ▁In ▁reality , ▁it ▁is ▁the ▁ensemble ▁of ▁the ▁social ▁relations . ▁Feuer bach , ▁who ▁does ▁not ▁enter ▁upon ▁a ▁criticism ▁of ▁this ▁real ▁ess ence ▁is ▁hence ▁obliged : ▁▁