This series is comprised of a total of 296 titles (included, but not indvidually numbered: 28 duplicated copies and 2 periodical issues). Brochures, reviews, booklets, documents, maps, pamphlets and reprints that were titled in this series referred to 22 countries. They were written in 12 languages and some have several translations. The period covered in this series ranges between 1917 and 1946, with the majority relating to the 1910s and 1920s. Topics of the publications are peace movements and their worldwide historical development as well as the activities of peace associations and societies. They also include thoughts and opinions of various authors on the question of peace and war and on the concept of the united world and permanent peace which might be accomplished by a universally recognised code of international law or the voluntary establishment of an organization that went beyond the confines of national culture.

This series is comprised of a total of 60 items arranged in 6 subfiles and contains brochures, pamphlets, reprints, books, theses and periodicals. The publications range in date from 1906 to 1939, but most of the documents date from the 1920s and the 1930s. Most of the documents are written in English, some of them in French or German, and only a few in other languages. The series includes publications of missionary organizations and reports of international missionary conferences as well as documents on religious questions and churches in general.