War may sometimes be a necessary evil. But no matter how necessary, it is always an evil, never a good. We will not learn how to live together in peace by killing each other’s children. Jimmy Carter
James Earl Carter Jr. (born October 1, 1924) is an American politician who served as the 39th President of the United States from 1977 to 1981. He previously was the 76th Governor of Georgia from 1971 to 1975, after two terms in the Georgia State Senate from 1963 to 1967. Carter has remained active in public life during his post-presidency, and in 2002 he was awarded the Nobel Peace Prize for his work in co-founding the Carter Center.
If everyone demanded peace instead of another television set, then there’d be peace. John Lennon
John Winston Ono Lennon, MBE (born John Winston Lennon; 9 October 1940 – 8 December 1980) was an English singer-songwriter and activist who co-founded the Beatles, the most commercially successful and musically influential band in the history of popular music. He and fellow member Paul McCartney formed a much-celebrated songwriting partnership.
You may either win your peace or buy it: win it, by resistance to evil; buy it, by compromise with evil. John Ruskin
From that wonderful source Wikipedia: John Ruskin (8 February 1819 – 20 January 1900) was the leading English art critic of the Victorian era, also an art patron, draughtsman, watercolourist, a prominent social thinker and philanthropist. He wrote on subjects ranging from geology to architecture, myth to ornithology, literature to education, and botany to political economy.