8 , ▁p .   8 4 ): ▁' The ▁t endency ' s ▁aut onomy ▁is ▁just ▁its ▁independence ▁of ▁social ▁structure , ▁its ▁root ed ness ▁in ▁fundamental ▁material ▁facts ▁of ▁human ▁nature ▁and ▁the ▁human ▁situation .' ▁Allen ▁Wood ▁( 2 0 0 4 , ▁p .   7 5 ): ▁' H istor ical ▁progress ▁consists ▁fund ament ally ▁in ▁the ▁growth ▁of ▁people ' s ▁ab ilities ▁to ▁shape ▁and ▁control ▁the ▁world ▁about ▁them . ▁ ▁This ▁is ▁the ▁most ▁basic ▁way ▁in ▁which ▁they ▁develop ▁and ▁express ▁their ▁human ▁ess ence ' ▁( see ▁also , ▁the ▁quot ation ▁from ▁Allen ▁Wood ▁above ). ▁ ▁In ▁his ▁article ▁Re cons ider ing ▁Historical ▁Material ism , ▁however , ▁C ohen ▁gives ▁an ▁argument ▁to ▁the ▁effect ▁that ▁human ▁nature ▁cannot ▁be ▁the ▁prem ise ▁on ▁which ▁the ▁pla us ibility ▁of ▁the ▁expansion ▁of ▁the ▁product ive ▁forces ▁is ▁ground ed . ▁ ▁' Produ ction ▁in ▁the ▁historical ▁anth rop ology ▁is ▁not ▁identical ▁with ▁production ▁in ▁the ▁theory ▁of ▁history . ▁ ▁According ▁to ▁the ▁anth rop ology , ▁people ▁fl our ish ▁in ▁the ▁cultiv ation ▁and ▁exercise ▁of ▁their ▁manifold ▁powers , ▁and ▁are ▁especially ▁product ive ▁- ▁which ▁in ▁this ▁instance ▁means ▁cre ative ▁- ▁in ▁the ▁condition ▁of ▁freedom ▁con ferred ▁by ▁material ▁plenty . ▁ ▁But , ▁in ▁the ▁production ▁of ▁interest ▁to ▁the ▁theory ▁of ▁history , ▁people ▁produce ▁not ▁freely ▁but ▁because ▁they ▁have ▁to , ▁since