CCC 360 Because of its common origin the human race forms a unity, for “from one ancestor [God] made all nations to inhabit the whole earth”:1
O wondrous vision, which makes us contemplate the human race in the unity of its origin in God. .. in the unity of its nature, composed equally in all men of a material body and a spiritual soul; in the unity of its immediate end and its mission in the world; in the unity of its dwelling, the earth, whose benefits all men, by right of nature, may use to sustain and develop life; in the unity of its supernatural end: God himself, to whom all ought to tend; in the unity of the means for attaining this end;... in the unity of the redemption wrought by Christ for all.2
1 Acts 17:26; cf. Tob 8:6.
2 Pius XII. Enc. Summi pontificatus 3; cf. NA 1.