"Adam fell that man might be." (2 Nephi 2:25.) There were no pre- Adamic men in the line of Adam. The Lord said that Adam was the first man. (Moses 1:34, 3:7; D. & C. 84:16.) It is hard for me to get the idea of a man ahead of Adam, before the first man. The Lord also said that Adam was the first flesh (Moses 3:7) which, as I understand it, means the first mortal on the earth. I understand from a statement in the book of Moses, which was made by Enoch, that there was no death in the world before Adam. (Moses 6:48; see also 2 Nephi 2:22.) Enoch said:

. . . death hath come upon our fathers; nevertheless we know them, and cannot deny, and even the first of all we know, even Adam.

For a book of remembrance we have written among us, according to the pattern given by the finger of God; and it is given in our own language. (Moses 6:45-46.)

I understand from this that Enoch could read about Adam in a book which had been written under the tutelage of Almighty God. Thus there were no prehistoric men living in the days of Adam, who was the first man, wrote.

I am not a scientist. I do not profess to know anything but Jesus Christ, and him crucified, and the principles of his gospel. If, however, there are some things in the strata of the earth indicating that there were men before Adam, they were not the ancestors of Adam.

Adam was the son of God. He was our elder brother, not older than Jesus, but he was our brother in the same sense that Jesus was our brother, and he "fell" to earth life. He did not come up through an unbroken line of organic evolution. There had to be a fall. "Adam fell that men might be." (2 Nephi 2:25.)