Pope Francis I

Evangelii Gaudium . . . (The Joy of the Gospel), 2014

Pope Benedict XVI

Deus Caritas Est. . . (God Is Love), 2005
Sacramentum Caritatis. . . (The Eucharist as the Source and Summit of the Church’s Life and  Mission), 2007 (especially paragraphs 47, 49, 82-84, and  88-92)
Caritas in Veritate. . . (Charity in Truth), 2009

Pope John Paul II

Laborem Exercens. . . (On Human Work), 1981
Sollicitudo Rei Socialis. . . (On Social Concern), 1987
Centesimus Annus. . . (The Hundredth Year), 1991
Veritatis splendor. . . (The Splendor of Truth), 1993
Evangelium Vitae. . . (The Gospel of Life), 1995
Ecclesia in America. . . (The Church in America), 1999
Fides et Ratio. . . (Faith and Reason), 1998

Pope Paul VI

Populorum Progressio. . . (On the Development of Peoples), 1967
Octogesima Adveniens. . . (A Call to Action), 1971
Evangelii Nuntiandi. . . (Evangelization in the Modern World), 1975

Second Vatican Council

Gaudium et Spes. . . (Pastoral Constitution on the Church in the Modern World), 1965
Dignitatis Humanae . . .  (Declaration on Religious  Freedom), 1965

Pope John XXIII

Mater et Magistra. . . (Christianity and Social Progress), 1961
Pacem in Terris. . . (Peace on Earth), 1963

Pope Pius XI

Quadragesimo Anno. . . (After Forty Years), 1931

Pope Leo XIII

Rerum Novarum. . . (On the Condition of Labor), 1891

Congregation for the Doctrine of the Faith

Doctrinal Note on Some Questions Regarding the Participation of Catholics in Political  Life. . ., 2002
Dignitas Personae. . . (The Dignity of a Person), 1998

Pontifical Council for Justice and Peace

The Church and Racism:  Towards a more fraternal society. . . ,  1989
Compendium of the Social Doctrine of the Church. . . , 2004