. ▁( This ▁pack ▁of ▁g um ▁is ▁now ▁on ▁display ▁at ▁the ▁Smith son ian ▁Institution ' s ▁National ▁Museum ▁of ▁American ▁History .) ▁In ▁ 1 9 8 4 , ▁W rig ley ▁introduced ▁a ▁new ▁g um , ▁Ext ra , ▁which ▁followed ▁the ▁new ▁tr end ▁of ▁sugar - free ▁g ums ▁in ▁the ▁US . ▁W rig ley ▁also ▁assumed ▁control ▁of ▁the ▁Chicago ▁C ubs ▁after ▁his ▁father ' s ▁death ▁in ▁ 1 9 7 7 , ▁and ▁sold ▁the ▁team ▁to ▁the ▁Chicago ▁Trib une ▁in ▁ 1 9 8 1 . ▁▁ 1 9 9 9 – 2 0 0 6 : ▁William ▁W rig ley ▁IV ▁William ▁" Be au " ▁W rig ley ▁IV ▁( 1 9 6 3 – ), ▁following ▁the ▁death ▁of ▁W rig ley ▁III ▁( his ▁father ), ▁led ▁the ▁sugar - free ▁g um ▁campaign ▁across ▁Europe , ▁Australia , ▁Spain , ▁India , ▁and ▁China . ▁In ▁ 2 0 0 5 , ▁Kraft ▁Food s ▁sold ▁the ▁Life ▁Sa vers ▁and ▁Al to ids ▁business es ▁to ▁W rig ley ▁in ▁exchange ▁for ▁$ 1 . 5 ▁billion ▁as ▁part ▁of ▁a ▁re organ ization ▁plan . ▁W rig ley ▁led ▁the ▁establishment ▁of ▁the ▁W rig ley ▁Science ▁Institute ▁( W SI ) ▁in ▁ 2 0 0 6 ▁to ▁study ▁the ▁or al ▁health ▁benefits ▁of ▁g um ▁che wing . ▁The ▁W SI ▁investig ates ▁the ▁effects ▁of ▁g um ▁che