I am a little embarrassed since I forgot to mention Seth ,and Adam's further offspring in Chapter 5 which included daughters. So then Cain lived long enough (100's of years) to wed one of those sisters? Is that how it worked?
Also, in Chapter 4: "Behold, thou hast driven me out this day from the face of the earth; and from thy face shall I be hid; and I shall be a fugitive and a vagabond in the earth; and it shall come to pass, that every one that findeth me shall slay me."
Who was there to slay Cain before he found his wife and begat his offspring and before Seth's offspring? Do I have the timeline correct?
With due respect to your faith, I stand by my belief that the OT is mostly fable. BTW, who wrote Genesis? Serious question.
Cain would have lived much longer than 100 years. More likely closer to the 900 years common back then. Only after Noah was the lifespan shortened.
Not sure why this is important to you but it's obvious that in the beginning it had to be close relatives. It's logical to understand that God would have made possible those reproductive possibilities without negative consequences.
>>With due respect to your faith, I stand by my belief that the OT is mostly fable.<<
I suppose if you ignore all available archaeological and historical proof that's possible. Every historian to date that I am aware of who set out to disprove it ended up believing it.
>>BTW, who wrote Genesis? Serious question.<<
Bottom line is that it is God who is the author as He is all of scripture. Through which human is not totally proven. We do know that cuneiform tablets have been discovered that date all the way back to 3500BC so that would be in Adam's lifetime since he would have died around 3074BC. Most believe that it was Moses and/or Israelite scribes who compiled the information.