But they didn't sin?
But:
[bible]
20And the LORD said, "(
U)The outcry of Sodom and Gomorrah is indeed great, and their sin is exceedingly grave. 21"I will (
V)go down now, and see if they have done entirely according to its outcry, which has come to Me; and if not, I will know."
[\bible]
And:
[bible]
Then the LORD saw that the wickedness of man was great on the earth, and that (
D)every intent of the thoughts of his heart was only evil continually. 6(
E)The LORD was sorry that He had made man on the earth, and He was (
F)grieved in His heart.
7The LORD said, "(
G)I will blot out man whom I have created from the face of the land, from man to animals to creeping things and to birds of the sky; for (
H)I am sorry that I have made them."
8But (
I)Noah (
J)found favor in the eyes of the LORD.
9These are the records of the generations of Noah. Noah was a (
K)righteous man, (
L)blameless in his time; Noah (
M)walked with God.
10Noah became the father of three sons: Shem, Ham, and Japheth.
11Now the earth was (
N)corrupt in the sight of God, and the earth was (
O)filled with violence.
12God looked on the earth, and behold, it was corrupt; for (
P)all flesh had corrupted their way upon the earth.
13Then God said to Noah, "(
Q)The end of all flesh has come before Me; for the earth is filled with violence because of them; and behold, I am about to destroy them with the earth.
[/bible]
So either you are wrong, and are misunderstanding Paul. Or Paul is wrong, or Genesis is wrong, and the people between Adam and Moses didn't sin.
JM