See this online text:

  • “Human Solidarity: A Thomistic Perspective”, by Brendan O’Connor (2012). The excerpt is available in pdf format on this page of the University of Navarra, from: Excerpta e dissertationibus in Sacra Theologia, vol.59, pág. 1-413.

See also the texts listed on the page Society and Social Teaching, and on the post “Online ebook: Caritas in Veritate: On Integral Human Development, by Pope Benedict XVI“; as well as the following:

  • “The Anthropological Vision of Caritas in veritate in Light of Economic and Cultural Life in the United States”, by David L. Schindler, Communio, Volume 37, No. 4 (Winter 2010): pp. 558-579. Available in pdf format through this page of Communio.
  • “The Christian Humanism of Karol Wojtyla and Thomas Aquinas”, by Robert Barron, Nova et Vetera, English Edition, Vol. 3, No. 3 (Summer 2005): pp. 529-542. The text is available on this page of Nova et Vetera at the Saint Paul Center for Biblical Theology.
  • “Distributive Energy Justice and the Common Good”, by Anders Melin, De Ethica: A Journal of Philosophical, Theological and Applied Ethics, Vol. 6 No. 1 (2020): pp. 35-50. Available in pdf format on this page of De Ethica.
  • “The Foundations of Solidarity in St. Thomas Aquinas”, by Brendan O‘Connor. The text is described as “Extracto de la Tesis de Licenciatura presentada en la Facultad de Teología de la Universidad de Navarra, en 2006”. Available in pdf format on this page of Encuentra. May be read online on this page of the Asociación Almudí De Valencia.
  • “Liberation, Development, and Human Advancement: Catholic Social Doctrine in Caritas in Veritate”, by Miguel J. Romero, Nova et Vetera, English Edition, Vol. 8, No. 4 (Fall 2010): pp. 923-957. The text is available on this page of Nova et Vetera at the Saint Paul Center for Biblical Theology; and at ResearchGate.net.
  • “Understanding the Common Good”, by Steven A. Long, Nova et Vetera, English Edition, Vol. 16, No. 4 (Fall 2018): pp. 1135-1152. The text is available on this page of Nova et Vetera at the Saint Paul Center for Biblical Theology.

On the secular observance of the International Day of Human Fraternity. For other texts and ebooks, you may access the List of Free eBooks (Arranged by Title), the List of Free eBooks (Grouped by Subject), the List of Worth-It Catholic Books & eBooks, and the main page of the Catholic eBooks Project.