“We must convince each generation that they are but transient passengers on this planet earth. It does not belong to them. They are not free to doom generations yet unborn. They are not at liberty to erase humanity's past nor dim its future.”

2010s, Erasing History? Monuments and Memory (January 2016)

On the Paris Agreement, as quoted in " Factbox: World reacts to new climate accord http://www.reuters.com/article/us-climatechange-summit-reaction-factbox-idUSKBN0TV0Q420151213", Reuters (12 December 2015)

Source: Le premier siècle après Béatrice

1960s, The Rising Tide of Racial Consciousnes (1960)
Context: In this period of social change the Negro must work on two fronts. On the one hand we must continue to break down the barrier of segregation. We must resist all forms of racial injustice. This resistance must always be on the highest level of dignity and discipline. It must never degenerate to the crippling level of violence. There is another way-a way as old as the insights of Jesus of Nazareth and as modern as the methods of Mahatma Gandhi. It is a way not for the weak and cowardly but for the strong and courageous. It has been variously called passive resistance, non-violent resistance or simply Christian love. It is my great hope that as the Negro plunges deeper into the quest for freedom, he will plunge deeper into the philosophy of non-violence. As a race we must work passionately and unrelentingly for first-class citizenship, but we must never use second class methods to gain it. Our aim must not be to defeat or humiliate the white man, but to win his friendship and understanding. We must never become bitter nor should we succumb to the temptation of using violence in the struggle, for if this happens, unborn generations will be the recipients of a long and desolate night of bitterness and our chief legacy to the future will be an endless reign of meaningless chaos.

Letter http://etext.virginia.edu/jefferson/quotations/jeff1340.htm to James Madison (6 September 1789) ME 7:455, Papers 15:393
1780s

Northern Ireland: Bloody Sunday commemorated 50 years on https://www.vaticannews.va/en/world/news/2022-01/northern-ireland-bloody-sunday-commemorated-50-years-on.html (29 January 2022)

No. 166 (10 September 1711)
The Spectator (1711–1714)

Abigail Scott Duniway, quoted in Westward the Women https://books.google.com/books?id=Xy50CwAAQBAJ&pg=PT127&lpg=PT127&dq=%22+young+women+of+today,+free+to+study,+to+speak,+to+write%22&source=bl&ots=9gDARyV3TU&sig=qp7E9Zg0u1yJCbJVQ-pqBeu49JE&hl=en&sa=X&ved=0ahUKEwi_zKKCp5zZAhUEyGMKHTdVCcQQ6AEINTAC#v=onepage&q=%22%20young%20women%20of%20today%2C%20free%20to%20study%2C%20to%20speak%2C%20to%20write%22&f=false and by the Hatfield School of Govennment's Center for Women's Leadership https://www.pdx.edu/womens-leadership/abigail-scott-duniway-speaker-series

2014, Young Southeast Asian Leaders Initiative Town Hall (April 2014)
Context: No nation is immune to dangerous and disruptive weather patterns, so every nation is going to have to do its part. And the United States is ready to do ours. Last year, I introduced America’s first-ever Climate Action Plan to use more clean energy and less dirty energy, and cut the dangerous carbon pollution that contributes to climate change. So we want to cooperate with countries in Southeast Asia to do the same, to combat the destruction of our forests. We can’t condemn future generations to a planet that is beyond fixing. We can only do that together.