Truthseeker says-
The problem with not believing in Adam and Eve is at some point in Earth's distant past, there had to be a only a handful of people living at the time just to procreate.
Statements like that strongly suggest you're likely not aware of basic principles of genetics which needed to understand human evolution, since the actual story is a bit more complex than "God Dun It!".
There is no need for ONLY one pair to create a new species (founder effect). In fact, a new species resulting from a single breeding pair IS possible, but it's a risky situation (due to the 'population bottlenecking' of the gene pool; it takes a long time for the gene pool to 'fan out' and recover in order to slowly increasing the species' resistance to various threats that may drive the species extinct by a single challenge, whether a genetic disease or an external challenge like a virus/bacteria, etc).
In the past, conservationists didn't think about the loss of genetic diversity in species, and would rejoice when they managed to save a single breeding pair of a species from the brink of extinction. Then they realized that what is actually lost is the genetic diversity of the species, which means that the odds of survival goes down since the species literally is genetically "putting all of their eggs in one basket".
(The wikipedia page above on population bottlenecking uses the example of the Northern Elephant Seal)
"So how many couples were there? Or was there just one couple, Adam and Eve?
That seemingly simple question would require an essay, and even then, it takes YEARS of study in biology to get up to speed:
https://en.wikipedia.org/wiki/Human_evolution
You didn't understand the Bible overnight, so you can't expect a miracle of being filled with "Scientific Holy Spirit" to help you learn the much-more complex story of life on the planet in a short period.
BTW, I don't expect you will find the story of hominid evolution as emotionally satisfying, since it's not as cozy as "God Dun It!"; hence why 80% of Americans choose to cling to creationism despite MOUNTAINS of evidence. For lay-people, it's not about logic, but about being conscious of their "spiritual (emotional) needs" and let the scientific evidence be damned.
And if there is no Adam and Eve, how can it be said that Jesus descended from Adam given the genealogical account in Luke?"
Maybe you would like to explain why the Bible in Matthew and Luke offers TWO geneologies for Jesus, which are quite different (with one seemingly driven by a matrilineal vs patrilineal geneology, since remember: Jesus supposedly was conceived by His Father in Heaven via Holy Spirit (immaculate conception)? So why should Joseph's (his stepfather's) lineage even matter, unless Luke was trying to fit a square peg into a round hole)?
If you're a Christian, you owe it to yourself to read some books by Bart Ehrman: he's a theology graduate and New testament scholar and professor who has authored many different books that point out the logical inconsistencies in the New Testament.
This reasoning completly destroys the need for a Messiah and hence Christianity is just another road to nowhere.
And thus joining the ranks of a LONG TRADITION of theologically-driven beliefs based on man's desires: it's not the first, and it definitely won't be the last since many people typically prefer a comforting fantasy over stone-cold sober reality: they cherry-pick what they WANT to believe, even DESPITE evidence. Hence why there's STILL a Flat Earth Society, even in this day and age of satellites orbiting the Earth, moon shots, etc.
Adamah