The document summarizes the 12 major documents of Catholic Social Teaching (CST) that provide moral principles and priorities to guide social action. It begins with Rerum Novarum in 1891 addressing workers' rights and conditions, and ends with Centessimus Annus in 1991 reviewing the Church's fundamental social teachings. The CST documents collectively address issues like economic systems, globalization, development, peace, modern society, and integral human development from economic, political, cultural and spiritual perspectives.