Josiah Strong (1847-1916) was a Congregational minister and Social Gospel movement leader. This collection contains Josiah Strong biography manuscript drafts by Elsie Strong with commentary notes by Margery Strong; correspondence and notes written by Josiah Strong, personal effects and memorabila, a travel diary, and other personal materials; as well as correspondence from and to Josiah Strong and correspondence between Strong's daughters Elsie and Margery to those involved with his biography, including publishers, scholars, and universities.