The Young Mens and Womens Christian Associations were founded as a response to unhealthy social and living conditions in cities at the end of the Industrial Revolution. The collection contains pamphlets, reports, and correspondence regarding the YMCA 19th World Conference in Helsinki, Finland; pamphlets, correspondences, minutes, and questionnaires related to the YMCA Constantinople Branch in Turkey between 1926-1928; reports regarding the history and progress of the YMCA and YWCA in different countries; and pamphlets, questionnaires, records, and history of the YMCA in different parts of the world including Japan, Czechoslovakia, Poland, China and Belgium.