This campaign flyer, dating to July 1924, launches a nationwide observance of the Tenth Anniversary of the Outbreak of World War I with the keynote message, "STOP WAR! COOPERATE! ISOLATION WILL NOT STOP WAR!" This document was published by the National Council for Prevention of War (NCPW), an organization that, under the direction of Frederick Libby, coordinated various high-profile anti-war campaigns. Published during the presidential election cycle, the leaflet explicitly casts international cooperation as "the foremost issue" and demands that the public hold political candidates accountable with the question, "Mr. Candidate: How Far Will You Cooperate for World Peace?" Excerpts:"'STOP WAR! COOPERATE!' will be the keynote of the observance in America of the Tenth Anniversary of the Outbreak of the World War, July 26-27. It will mark the beginning of a nation-wide campaign to give World Cooperation its rightful place as the foremost issue in the coming election campaign. If we can't stop war, nothing else matters. Another World War would be the end of the white civilization. By the use of posters and fliers and through meetings, religious services, parades and other features, the people of America will register their determination that Isolation is not acceptable as an American policy in foreighn affairs and that only through Cooperation can we Stop War."
National Council for Prevention of War (U.S.) (Tue,) studied this question.