▁prof ound ". ▁According ▁to ▁historian ▁David ▁Simon elli , ▁such ▁was ▁their ▁international ▁influence , ▁it ▁was ▁the ▁song ▁that ▁formally ▁announced ▁the ▁arrival ▁of ▁flower ▁power ▁ide ology ▁as ▁a ▁main stream ▁concept . ▁The ▁Beat les ▁followed ▁up ▁the ▁u top ian ▁spirit ▁of ▁Our ▁World ▁in ▁their ▁activities ▁over ▁July ▁and ▁August , ▁during ▁their ▁first ▁summer ▁free ▁of ▁tour ▁commit ments . ▁In ▁late ▁July , ▁the ▁band ▁investig ated ▁the ▁possibility ▁of ▁bu ying ▁a ▁Greek ▁island ▁with ▁a ▁view ▁to ▁setting ▁up ▁a ▁hi pp ie - style ▁commune ▁for ▁themselves ▁and ▁members ▁of ▁their ▁inner ▁circle . ▁After ▁sail ing ▁around ▁the ▁A ege an ▁Sea ▁and ▁appro ving ▁a ▁location ▁on ▁the ▁island ▁of ▁Les lo , ▁the ▁Beat les ▁decided ▁against ▁the ▁idea ▁and ▁returned ▁to ▁London . ▁In ▁early ▁August , ▁Harrison ▁and ▁a ▁small ▁ent ou rage ▁made ▁a ▁well - public ised ▁visit ▁to ▁the ▁international ▁hi pp ie ▁capital ▁of ▁Ha ight - A sh bury , ▁in ▁San ▁Francisco . ▁▁ ▁Writing ▁in ▁ 2 0 0 1 , ▁Peter ▁Dog get t ▁said ▁that ▁the ▁Beat les ' ▁performance ▁on ▁Our ▁World ▁" rem ains ▁one ▁of ▁the ▁strong est ▁visual ▁impress ions ▁of ▁the ▁summer ▁of ▁love "; ▁W om ack ▁describes ▁it ▁as ▁" flow er ▁power ' s ▁fin est ▁moment ". ▁Rol ling ▁Stone ▁ranks ▁" All ▁You ▁Need ▁Is ▁Love " ▁ 3 7 0 th ▁on ▁its ▁list ▁of ▁the ▁"