The Unification Church, formally known as the Holy Spirit Association for the Unification of World Christianity, was established in Korea in 1954 by Reverend Sun Myung Moon. Moon considered himself a prophet whose teachings were divinely inspired. The Unification Church believes its mission is to prepare humankind for the Messiah by unifying all forms of Christianity along its doctrinal lines. The Divine Principle is the main theological book of the Unification Church. Organizationally, the church is divided into national and state churches, which are affiliated with the Unification Church International. The Unification Church also has had numerous affiliated organizations, such as the Collegiate Association for the Research Principle (CARP), an association of students, and the Unification Community Action Program (Uni-C.A.P.), a community service program. The Unification Church is also known as the Tong Il movement, the Unified Family, and the Moon Organization. Its followers are often referred to as "Moonies."

This collection (1963-1991, n.d.) contains promotional materials; articles related to the Unification Church in Ames, Iowa and nationally; CAUSA International meeting and seminar materials; correspondence; instructional literature and notes; religious freedom rally memoranda, articles and other materials; and activity announcements for the Unification Community Action Program (Uni-C.A.P.). Most of the materials are related to Iowa State University/Ames, Des Moines and Iowa but the collection also includes materials from the national Unification Church and its affiliated organizations.