S Katharine Drexel: "each creature is preserved"

All of them differ, one from another, yet none of them has he made in vain,

-- Sir 42:15-25

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.

-- CCC 1935