The only real progress to abiding peace is found in the friendly disposition of peoples and … facilities for maintaining peace are useful only to the extent that this friendly disposition exists and finds expression. War is not only possible, but probable, where mistrust and hatred and desire for revenge are the dominant motives. Our first duty is at home with our own opinion, by education and unceasing effort to bring to naught the mischievous exhortation of chauvinists; our next is to aid in every practicable way in promoting a better feeling among peoples, the healing of wounds, and the just settlement of differences.

The Pathway of Peace (1923)