score:8
The answer can actually be found in the very next verse:
35 But only an account of this earth, and the inhabitants thereof, give I unto you. For behold, there are many worlds that have passed away by the word of my power. And there are many that now stand, and innumerable are they unto man; but all things are numbered unto me, for they are mine and I know them.
If many worlds had already existed and completed their cycle by this point, then clearly Adam was the first man of this world.
He was definitely chosen for a reason, out of all the spirit children of God who were to come to this earth, to hold a preeminent place in creation. Exactly what that reason was has not been revealed, though there are three passages in the Doctrine and Covenants that refer to Adam as being the same person as Michael the Archangel. (See D&C 27:11, 107:54, and 128:21.)
Upvote:0
As for your question that was not answered.
Was Adam the first son of God in the pre-mortal life as well?
Jesus is the firstborn of the spirit children of our Heavenly Father, the Only Begotten of the Father in the flesh, and the first to rise from the dead in the Resurrection, βthat in all things he might have the preeminenceβ (Col. 1:13β18).