▁thought ▁S ism ond i ▁emb od ied ▁the ▁critique ▁of ▁the ▁" bour ge ois ▁science ▁of ▁econom ics ." ▁In ▁his ▁notes , ▁Marx ▁ex cer pt ed ▁various ▁aspects ▁of ▁his ▁analysis . ▁Marx ▁was ▁particularly ▁fond ▁of ▁S ism ond i ' s ▁statement ▁that ▁" The ▁Roman ▁pro let ariat ▁lived ▁almost ▁exclus ively ▁at ▁the ▁exp ense ▁of ▁society . ▁One ▁could ▁almost ▁say ▁that ▁modern ▁society ▁lives ▁at ▁the ▁exp ense ▁of ▁the ▁pro let ariat , ▁from ▁the ▁share ▁which ▁it ▁ded uct s ▁from ▁the ▁reward ▁of ▁his ▁labor ." ▁Henry k ▁G ross man ▁argued ▁that ▁S ism ond i ▁was ▁a ▁significant ▁method ological ▁and ▁theoretical ▁prede cess or ▁of ▁Marx , ▁particularly ▁by ▁ident ifying ▁the ▁contradiction ▁between ▁use - value ▁and ▁exchange - value ▁as ▁fundamental ▁to ▁capital ism . ▁In ▁ 1 8 9 7 , V lad imir ▁Len in ▁wrote ▁an ▁article ▁ref uting ▁S ism ond i ' s ▁work . ▁Len in ▁said ," ▁The ▁contrib utor ▁to ▁Rus sko ye ▁Bog at stvo ▁states ▁at ▁the ▁very ▁out set ▁that ▁no ▁writer ▁has ▁been ▁" so ▁wrong ly ▁app ra ised " ▁as ▁S ism ond i , ▁who , ▁he ▁alleg es , ▁has ▁been ▁" un just ly " ▁represented , ▁now ▁as ▁a ▁reaction ary , ▁then ▁as ▁a ▁u top ian . ▁The ▁very ▁opposite ▁is ▁true . ▁Pre cis ely ▁this ▁app rais al ▁of ▁S ism ond i