Hayagrīva: Augustine believed that all men came from Adam, that is the first man or one man, and that this one man God created—this one man—and this one man is the root of all mankind. He writes, "God knew how good it would be for this community often to recall that the human race had its roots in one man, precisely to show how pleasing it is to God that men, though many, should be one."
Prabhupāda: They... It is, our Vedic conception is also like that, that the mankind has come from Manu. From Manu, human being, or manuṣya... The Sanskrit word is manuṣya, "coming from Manu." So Manu is also coming from Brahmā. In this way, as the conception of a first creature, Adam, similarly, a first living being is Lord Brahmā. Therefore our proposition is that a living being coming from the living being. Brahmā is living being, or Adam is living being. Then the living being does not come from matter. Brahmā is also coming from the Supreme Lord as raja-guṇa avatāra, incarnation of raja-guṇa. So all living being, they are coming from the Supreme Living Being. So Brahmā is also the first creature within this universe.