Volume I of the proceedings likely contains foundational documents, opening remarks, and preliminary reports relating to the role of the laity in the Catholic Church and in the modern world, particularly in the post-Vatican II context. The primary focus of the congress and proceedings was to explore and redefine the role of the laity (non-clergy) in the Church's mission in the contemporary world. Its central theme reflected the Second Vatican Council's (which had just concluded in 1965) emphasis on the concept of the People of God and their inherent responsibility in the apostolate (the spread of the Gospel and Christian values). It also highlighted the role of the laity in promoting social justice, peace, and engagement in real-world issues, as noted in the congress' report on the then-deemed inadequate resolutions on birth control and war. Overall, Volume I documents the theological foundations and pastoral direction for greater lay involvement in the life of the Church and the transformation of the world, moving from the pre-conciliar model of obedience and docility to a more active and responsible role.