What the Catholic Church Teaches

Created in the image of the one God and equally endowed with rational souls, all men have the same nature and the same origin. Redeemed by the sacrifice of Christ, all are called to participate in the same divine beatitude: all therefore enjoy an equal dignity.

The equality of men rests essentially on their dignity as persons and the rights that flow from it: Every form of social or cultural discrimination in fundamental personal rights on the grounds of sex, race, color, social conditions, language, or religion must be curbed and eradicated as incompatible with God’s design.

From the Catechism of the Catholic Church, paragraphs #1934 & #1935