orch estr ated ▁program ▁showed ▁that ▁Cub ism ▁was ▁still ▁very ▁much ▁alive , ▁despite ▁claims ▁by ▁critics ▁to ▁the ▁contrary , ▁and ▁it ▁would ▁remain ▁so ▁for ▁at ▁least ▁a ▁half - de cade . ▁Miss ing ▁from ▁this ▁sequence ▁of ▁exhib itions ▁were ▁Jacques ▁Lip ch itz ▁( who ▁would ▁exhib it ▁in ▁ 1 9 2 0 ), ▁and ▁those ▁who ▁had ▁left ▁France ▁during ▁the ▁Great ▁War : ▁Robert ▁D ela un ay ▁and ▁Albert ▁G le izes ▁most ▁obviously . ▁Non eth eless , ▁according ▁to ▁art ▁historian ▁Christopher ▁Green , ▁" this ▁was ▁an ▁aston ish ingly ▁complete ▁demonstr ation ▁that ▁Cub ism ▁had ▁not ▁only ▁continued ▁between ▁ 1 9 1 4 ▁and ▁ 1 9 1 7 , ▁having ▁surv ived ▁the ▁war , ▁but ▁was ▁still ▁developing ▁in ▁ 1 9 1 8 ▁and ▁ 1 9 1 9 ▁in ▁its ▁" new ▁collect ive ▁form " ▁marked ▁by ▁" int el lect ual ▁rig or ". ▁In ▁the ▁face ▁of ▁such ▁a ▁display ▁of ▁vig our , ▁it ▁really ▁was ▁difficult ▁to ▁maintain ▁convin cing ly ▁that ▁Cub ism ▁was ▁even ▁close ▁to ▁ext inction ". ▁ ▁Ros enberg ▁also ▁organized ▁literary ▁and ▁musical ▁events ▁in ▁his ▁gallery . ▁ ▁The ▁art ▁collections ▁of ▁K ahn we iler ▁and ▁U h de ▁se quest ered ▁at ▁the ▁out set ▁of ▁World ▁War ▁I ▁( which ▁included ▁works ▁by ▁Georges ▁Bra que , ▁Ra oul ▁D uf y , ▁Juan ▁Gr is , ▁August