his view, through Our World, "'All You Need Is Love' marked a new chapter in the world's colonisation by telecommunications", and its message inspired the sentiments behind "Love Trumps Hate", displayed on placards protesting Donald Trump's 2016 US presidential win, and the One Love Manchester benefit concert. Validity of message In Granada Television's 1987 documentary It Was Twenty Years Ago Today, commemorating two decades since Sgt. Pepper and the Summer of Love, several of the interviewees were asked whether they still believed that "Love is all you need". Harrison was the only one who unequivocally agreed with the sentiment. Asked why this was, he told Mark Ellen of Q magazine: "They all said All You Need Is Love but you also need such-and-such else. But … love is complete knowledge. If we all had total knowledge, then we would have complete love and, on that basis, everything is taken care of. It's a law of nature." In 2009, George Vaillant, the chief investigator of the Grant Study, which tracked 268 Harvard undergraduates for a period of 80 years with the goal of finding what factors led to longevity, said that happiness had a strong correlation to close relationships, summarising: "Happiness is love. Full stop." The CBC reported that the "[Grant] study proves Beatles right: All You Need is Love." In popular culture During the Yes campaign of the Pablo Picasso purchase referendum of 1967, the slogan "All we need is Pablo" was used in reference to the song. In February 1968, "All You Need Is Love" was played in the "Fall Out" episode of the TV series The Prisoner, directed by Patrick McGoohan. It was a rare example of the Beatles licensing their music for use in another artist's film or television project. Tony Palmer titled his 17-part television series All You Need Is Love: The Story of Popular Music after the Beatles song. The series, which first aired in 1977, included an episode ("Mighty Good") dedicated to the band. In 1978, the Rutles parodied "All You Need Is Love" in their song "Love Life" and titled their television film satirising the Beatles' history All You Need Is Cash. According to New York Times journalist Marc Spitz, writing in 2013, this title was "really an attack" on the commercialisation of rock music by the late 1970s. Harrison showed his enduring admiration for the song by referencing it in his 1981