Speech, reported in Robert G. Torricelli, Andrew Carroll, In Our Own Words: Extraordinary Speeches of the American Century (2000), p. 126.
“We have to persuade men and women who are themselves reasonably well off that they have a duty to forgo some of the advantages they would otherwise enjoy for the sake of others who are much poorer. We have to persuade car workers in my constituency that they have an obligation to low-paid workers in the public sector. We have to persuade the British people as a whole that they have an obligation to Africans and Asians whom they have never seen. Our only hope is to appeal to the latent idealism of all men and women of good will, irrespective of their income brackets, irrespective of their class origins. In place of the politics of envy, we must put the politics of compassion; in place of the politics of cupidity, the politics of justice; in place of the politics of opportunism, the politics of principle. Only so can we hope to succeed. Only so will success be worth having.”
            Speech in Worsley, Lancashire (11 March 1972), quoted in The Times (13 March 1972), p. 4 
1970s
        
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Roy Jenkins 51
British politician, historian and writer 1920–2003Related quotes
“We have an obligation to those who died ... to remember.”
Oliver Stone: Satire and Controversy - Banff Centre for Arts and Creativity http://www.youtube.com/watch?v=7s2gBKApxyk (Oliver Stone reminiscing about Charlie Sheen's comments on Platoon's relevance as message vs entertainment)
                                        
                                        Source: Little Women (1868), Ch. 41 : Learning To Forget 
Context: When women are the advisers, the lords of creation don't take the advice till they have persuaded themselves that it is just what they intended to do. Then they act upon it, and, if it succeeds, they give the weaker vessel half the credit of it. If it fails, they generously give her the whole.
                                    
1990s, I Am a Man, a Black Man, an American (1998)
1920s, Whose Country Is This? (1921)
Statement before his fight with George Foreman (31 March 1973)