▁basis , ▁everything ▁is ▁taken ▁care ▁of . ▁It ' s ▁a ▁law ▁of ▁nature ." ▁ ▁In ▁ 2 0 0 9 , ▁George ▁Va ill ant , ▁the ▁chief ▁investig ator ▁of ▁the ▁Grant ▁Study , ▁which ▁track ed ▁ 2 6 8 ▁Harvard ▁under grad u ates ▁for ▁a ▁period ▁of ▁ 8 0 ▁years ▁with ▁the ▁goal ▁of ▁finding ▁what ▁factors ▁led ▁to ▁happiness , ▁stated ▁that ▁its ▁find ings ▁could ▁be ▁summar ised ▁as ▁" H app iness ▁is ▁love . ▁Full ▁stop ." ▁In ▁response ▁to ▁accus ations ▁that ▁the ▁statement ▁was ▁sentiment al ▁or ▁over ly ▁general , ▁Va ill ant ▁revis ited ▁his ▁find ings ▁and ▁concluded : ▁" The ▁short ▁answer ▁is ▁L - O - V - E ." ▁The ▁C BC ▁reported ▁that ▁the ▁"[ Gr ant ] ▁study ▁proves ▁Beat les ▁right : ▁All ▁You ▁Need ▁is ▁Love ." ▁Writing ▁in ▁ 2 0 1 7 , ▁Lud ov ic ▁Hunter - T il ney ▁of ▁the ▁Fin an cial ▁Times ▁said ▁that ▁the ▁song ▁" app ears ▁hop eless ly ▁na ive ▁ 5 0 ▁years ▁on " ▁yet ▁its ▁esp ous al ▁of ▁global ▁connected ness ▁had ▁become ▁increasing ly ▁relevant . ▁In ▁his ▁view , ▁through ▁Our ▁World , ▁"' All ▁You ▁Need ▁Is ▁Love ' ▁marked ▁a ▁new ▁chapter ▁in ▁the ▁world ' s ▁colon isation ▁by ▁tele communic ations ", ▁and ▁its ▁message ▁inspired ▁the ▁sent iments ▁behind ▁" L ove ▁Tr umps ▁H ate ",