Question:

Bob, Does the Bible actually say Adam was the first man? And, if so, where did Cain get a wife!

Answer: Both Old and New Testaments state that Adam was the first man.

The Genesis creation account is stated as literal, including precisely defined "sideral days" - "And the evening and the morning were the first day", etc. The Jewish Nation even stated their "days" as "evening and then morning", beginning each new "day" at 6PM.

1 Cor 15:45 and the Genesis account state that Adam was the first man:

1 Cor 15:45 speaks of two "PERFECT" men, Adam, who was "created perfect", but fell, and Jesus Christ who lived a "perfect life" and was found "without sin":

1 Cor 15:45 "And so it is written, The first man Adam was made a living soul; the last Adam was made a quickening spirit.
46 Howbeit that was not first which is spiritual, but that which is natural; and afterward that which is spiritual.
47 The first man is of the earth, earthy: the second man is the Lord from heaven".

Gen 2:7 "And the LORD God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul.
Gen 2: 18 And the LORD God said, It is not good that the man should be alone; I will make him an help meet for him.

In Gen 3:20 Adam called his wife's name Eve, because she was the mother of all living.

By Gen 4:17, the population must have been large enough for men to live in cities.

In Gen 5:4 and 5, Adam and Eve had sons and daughters for 930 years.

God's sanction against brothers and sisters and cousins marrying is first found in Lev chap 18, some 2,500 years after Adam.

Remember, in Gen chap 6, every human was destroyed in the Great Flood, except the 8 righteous members of Noah's family and the human race was started over with just 8 people.

Lot's daughters thought they were the last people on the planet after Sodom was destroyed and had children by their father. Gen 19:30-38

Gen 19:30 And Lot went up out of Zoar, and dwelt in the mountain, and his two daughters with him; for he feared to dwell in Zoar: and he dwelt in a cave, he and his two daughters.
31 And the firstborn said unto the younger, Our father is old, and there is not a man in the earth to come in unto us after the manner of all the earth:
32 Come, let us make our father drink wine, and we will lie with him, that we may preserve seed of our father.
33 And they made their father drink wine that night: and the firstborn went in, and lay with her father; and he perceived not when she lay down, nor when she arose.
34 And it came to pass on the morrow, that the firstborn said unto the younger, Behold, I lay yesternight with my father: let us make him drink wine this night also; and go thou in, and lie with him, that we may preserve seed of our father.
35 And they made their father drink wine that night also: and the younger arose, and lay with him; and he perceived not when she lay down, nor when she arose.
36 Thus were both the daughters of Lot with child by their father.
37 And the firstborn bare a son, and called his name Moab: the same is the father of the Moabites unto this day.

2 Pet 2:7 states that Lot was a "just man".

Adam is clearly stated to have been the first man on earth, and Eve is said to be the "mother of all living".

It was God's plan for brothers and sisters and cousins to marry, until the earth was well populated.

I take the Genesis account to be LITERAL, and after 36 years of intense Bible study I believe it more firmly than ever.

Jesus said the Scriptures cannot be broken, and they have not been proved wrong. I must believe the Bible.

  Yours "in Christ",

  Bob Jones