See this online ebook:

  • The Catholic Church and the Race Question, by the Reverend Father Yves M.-J. Congar, O.P. (Paris: M. Blondin, 1953). [N.B., The text is part of the series “The Race Question and Modern Thought” published by the United Nations Educational, Scientific and Cultural Organization (UNESCO). The Foreword states that it has an Imprimatur.] Available in pdf format at UNESCO.

On the Memorial of St. Martin de Porres in the Ordinary Form of the Roman Rite. For other legally free ebooks, you may access the List of Free eBooks (Arranged by Title) and the List of Free eBooks (Grouped by Subject).

‘Among the many errors which derive from the poisoned source of religious and moral agnosticism… is the forgetfulness of that law of human solidarity and charity which is dictated and imposed by our common origin and by the equality of rational nature in all men, to whatever people they belong, and by the redeeming Sacrifice offered by Jesus Christ on the Altar of the Cross to His Heavenly Father on behalf of sinful mankind…

‘[Scripture] shows us besides how other men took their origin from the first couple, and then goes on, in unsurpassed vividness of language, to recount their division into different groups and their dispersion to various parts of the world…. The Apostle of the Gentiles later on makes himself the herald of this truth which associates men as brothers in one great family, when he proclaims to the Greek world that God “hath made of one, all mankind…” (Acts xvii. 26, 27).

‘A marvelous vision, which makes us see the human race in the unity of one common origin in God…; in the unity of nature which in every man is equally composed of material body and spiritual, immortal soul; in the unity of the immediate end and mission in the world; in the unity of dwelling place, the earth…; in the unity of the supernatural end, God Himself, to Whom all should tend; in the unity of means to secure that end.’ (Venerable Pope Pius XII, Encyclical “Summi Pontificatus” on the Unity of Human Society)