Quote:If,as the Bible says Adam and Eve were the first couple on earth, I take it we all stemmed from them, therefore we are all related ot each other.
That's how it's written yes.
Quote:So how did that happen without a serious amount of inbreeding and incest?
It couldn't. Without subsequent recreation of humans it would necessarily involve incest, particularly when the population of the Earth is later destroyed with the exception of Noah and his family. Thus yet another round of inbreeding occurs.
Of course this obviously didn't actually happen. You can see the results of the entire species being rebuilt from too few individuals by looking at Acinonyx Jubatus, (The cheetah).
Thus the bible is clearly and obviously inaccurate in at least that one detail, the theological implications of such are a matter to be decided by those who use it as a source of religious inspiration.