What Social and Political Significance did Lennon have in the late 60's and 70's?

John Lennon and Yoko Ono used their honeymoon as what they termed a "Bed-In for Peace" at the Amsterdam Hilton Hotel; the March 1969 event attracted worldwide media ridicule.[178][179] At a second Bed-In three months later at the Queen Elizabeth Hotel in Montreal[180] Lennon wrote and recorded "Give Peace a Chance". Released as a single, it was quickly taken up as an anti-war anthem and sung by a quarter of a million demonstrators against the Vietnam War in Washington, DC, on 15 October, the second Vietnam Moratorium Day.[80][181]

Later that year, Lennon and Ono supported efforts by the family of James Hanratty, hanged for murder in 1962, to prove his innocence.[182] Those who had condemned Hanratty were, according to Lennon, "the same people who are running guns to South Africa and killing blacks in the streets. ... The same bastards are in control, the same people are running everything, it's the whole bulls**t bourgeois scene."[183] In London, Lennon and Ono staged a "Britain Murdered Hanratty" banner march and a "Silent Protest For James Hanratty",[78] and produced a 40-minute documentary on the case. At an appeal hearing years later, Hanratty's conviction was upheld