▁his ▁own ▁activity , ▁and ▁that ▁what ▁distingu ishes ▁man ▁from ▁animal ▁is ▁not ▁reason ▁but ▁labor . ▁Thus ▁Marx ▁challeng es ▁the ▁traditional ▁pra ise ▁of ▁reason . ▁ ▁Moreover , ▁for ▁Marx ▁violence ▁is ▁the ▁leading ▁force ▁that ▁determ ines ▁human ▁relations , ▁while ▁for ▁the ▁traditional ▁thought ▁it ▁is ▁the ▁most ▁dis gra ce ful ▁of ▁human ▁actions ▁and ▁the ▁symbol ▁of ▁ty ran ny . ▁ ▁References ▁ ▁Bibli ography ▁▁▁▁▁▁ ▁( Re vision ▁as ▁of ▁May ▁ 2 0 1 8 ) ▁▁▁ ▁Category : Pol it ical ▁philosophy ▁Category : Cont empor ary ▁philosoph ical ▁literature ▁Category : Book s ▁by ▁Hann ah ▁Ar end t ▁Category : Book s ▁in ▁political ▁philosophy ▁Category : V ik ing ▁Press ▁books ▁Category : F ab er ▁and ▁Fab er ▁books ▁Category : 1 9 6 1 ▁non - f iction ▁books <0x0A> </s> ▁E ct em nius ▁son or ensis ▁is ▁a ▁species ▁of ▁square - head ed ▁was p ▁in ▁the ▁family ▁Cra br on idae . ▁It ▁is ▁found ▁in ▁Central ▁America . ▁ ▁References ▁ ▁Category : C ra br on idae ▁Category : Art icles ▁created ▁by ▁Q bug bot ▁Category : In sect s ▁described ▁in ▁ 1 8 9 1 <0x0A> </s> ▁Elizabeth ▁Sim pson ▁may ▁refer ▁to : ▁▁ ▁Elizabeth ▁Sim pson ▁( arch ae ologist ) ▁ ▁Elizabeth ▁Sim pson ▁( bi ologist ) ▁ ▁Elizabeth ▁In ch b ald ▁( née ▁Sim pson ) ▁( 1 7 5 3