, ▁etc ., ▁etc . ▁ ▁No ah ▁adm its ▁the ▁evidence ▁of ▁this ▁correlation ▁is ▁" circ um st ant ial ▁rather ▁than ▁direct ", ▁but ▁so ▁is ▁" the ▁evidence ▁that ▁sm oking ▁is ▁a ▁leading ▁cause ▁of ▁lung ▁cancer ." ▁ ▁In ▁his ▁ 2 0 1 7 ▁book ▁The ▁Great ▁Level er , ▁historian ▁Walter ▁Sche idel ▁point ▁out ▁that , ▁starting ▁in ▁the ▁ 1 9 7 0 s , ▁both ▁parties ▁shift ed ▁towards ▁prom oting ▁free ▁market ▁capital ism , ▁with ▁Republic ans ▁moving ▁further ▁to ▁the ▁political ▁right ▁than ▁Democr ats ▁to ▁the ▁political ▁left . ▁He ▁notes ▁that ▁Democr ats ▁have ▁been ▁instrument al ▁in ▁the ▁financial ▁der eg ulation ▁of ▁the ▁ 1 9 9 0 s ▁and ▁have ▁largely ▁neglect ed ▁social ▁w elf are ▁issues ▁while ▁increasing ly ▁foc using ▁on ▁issues ▁per tain ing ▁to ▁identity ▁politics . ▁The ▁Cl inton ▁Administration ▁in ▁particular ▁continued ▁prom oting ▁free ▁market , ▁or ▁ne oli ber al , ▁re forms ▁which ▁began ▁under ▁the ▁Re agan ▁Administration . ▁ ▁Non - party ▁political ▁action ▁ ▁According ▁to ▁political ▁scient ists ▁Jacob ▁H acker ▁and ▁Paul ▁Pi erson ▁writing ▁in ▁the ▁book ▁W inner - Take - All ▁Polit ics , ▁the ▁important ▁policy ▁sh ifts ▁were ▁brought ▁on ▁not ▁by ▁the ▁Republican ▁Party ▁but ▁by ▁the ▁development ▁of ▁a ▁modern , ▁efficient ▁political ▁system , ▁especially ▁lo bb ying , ▁by ▁top ▁ear ners ▁– ▁and ▁particularly ▁corpor ate ▁execut ives ▁and