“We are all fellow passengers on a dot of earth. And each of us, in the span of time, has really only a moment among our companions. How incredible it is that in this fragile existence, we should hate and destroy one another. There are possibilities enough for all who will abandon mastery over others to pursue mastery over nature. There is world enough for all to seek their happiness in their own way.”
1960s, Inaugural address (1965)
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Lyndon B. Johnson 153
American politician, 36th president of the United States (i… 1908–1973Related quotes

Radio excerpt presented by Voice of America (17 January 2010) http://learningenglish.voanews.com/content/margaret-mead-1901-1978-one-of-the-most-famous-anthropologists-in-the-world-124869344/112571.html
2000s

On Queen Elizabeth I of England, in 1587; reported in Emil Reich, Woman Through the Ages: Volume 2 (1908), p. 38. Alternately reported without the phrase "each other" and ending with "would have ruled the whole world".
Attributed

https://www.goodreads.com/quotes/9672842-no-one-should-need-to-be-big-enough-to-destroy