Returning to the theme of this thread, which is the demonstration of Adam as the literal founder of humankind, we should consider the “omission” of the fact that Adam had a material physical decomposing anatomy and lived in a broad material physical decomposing environment.
Yes, God gave Adam an extra, above and beyond, gift of immortality which simply means that Adam did not have to experience bodily death as part of the process of reaching the state of joy eternal in the presence of the Beatific Vision. (Information source.
CCC Glossary, Beatific Vision, page 867 and its suggestion of
CCC paragraphs;
CCC Glossary, Beatitude, page 868 and its suggestion of *CCC *paragraphs) This gift did not remove the fact that Adam’s anatomy required material nourishment. (Information source. Genesis 1: 29; Genesis 2: 15-17; Genesis 3: 11)
Because this exceptional gift of immortality was intimately connected to the precise relationship between the first human and his Creator, there could be only one Adam who could pass down the gift of immortality to all humankind. Because of the Catholic teachings in *CCC *1730-1732 and
Humani Generis one original Adam is necessary in order to insure that all humans would have the gift of immortality.
Links to the universal
Catechism of the Catholic Church, Second Edition
usccb.org/beliefs-and-teachings/what-we-believe/catechism/catechism-of-the-catholic-church/
scborromeo.org/ccc.htm
Humani Generis
w2.vatican.va/content/pius-xii/en/encyclicals/documents/hf_p-xii_enc_12081950_humani-generis.html