Gaudium et Spes (meaning "Joy and Hope"), is the Pastoral Constitution on the Church in the Modern World and from the Second Vatican Council. The document is an overview of the Catholic Church's teachings about man's relationship to society, especially in reference to economics, poverty, social justice, culture, science & technology, and ecumenism.
Click here to access Gaudium et Spes online at the Vatican archives.
Gerald Darring, professor of Theology at Spring Hill College and webmaster of the Theology Library, has written on Gaudium et Spes extensively and is a good resource for those looking for additional information on the text.
Interested in Walsh's third President, Br. Francis Blouin's, thoughts on Gaudium et Spes? DVD copies available on Reserve in the Walsh Library or Archives!