Gaudium et Spes is a pastoral constitution issued by Pope Paul VI in 1965 that addresses the Catholic Church's relationship with the modern world. It discusses topics like poverty, social justice, science, technology, and ecumenism. The document was approved by over 90% of bishops at the Second Vatican Council and has significantly influenced Christian social teachings. It establishes that the joys, hopes, griefs and anguish of all people, especially the poor and afflicted, belong to followers of Christ.