Although these are three question with long explanations, I think they should only result in short answers. So I put these three in one thread.
The Church teaches that we have a lineage to Adam and Eve, as stated in Pope Pius XII’s encyclical Humani Generis
When, however, there is question of another conjectural opinion, namely polygenism, the children of the Church by no means enjoy such liberty. For the faithful cannot embrace that opinion which maintains that either after Adam there existed on this earth true men who did not take their origin through natural generation from him as from the first parent of all, or that Adam represents a certain number of first parents. Now it is in no way apparent how such an opinion can be reconciled with that which the sources of revealed truth and the documents of the Teaching Authority of the Church propose with regard to original sin, which proceeds from a sin actually committed by an individual Adam and which, through generation, is passed on to all and is in everyone as his own.
However my question is whether this is stating we have an exclusive origin from Adam and Eve or that we have an origin through Adam and Eve. (when I say “human species,” I mean a biologically a human being or of a close relative that does not have a soul since only Adam and Eve and their descendants had souls)
What I do know this rejects is the idea that some have an origin outside of Adam and Eve (polygenism). However, does this also reject the idea that we have a lineage from Adam and Eve but also from other human species?
For example. Adam and Eve had a child. The child had relations with another human species. They have a baby. The baby has its ancestry tied to Adam and Eve. Is this possible within Pope Pius XII’s encyclical on defining monogeism? Or do all humans today have EXCLUSIVE ancestry to ONLY Adam and Eve? I ask this because I’ve always considered Neanderthals to not be truly humans, however Europeans and others have Neanderthal DNA, implying that there was interbreeding between regular humans and Neanderthals. Unless, Neanderthals are descendants of Adam and Eve?
I know the Genesis account does not have to be viewed literally as Church teaching (besides certain specifics such as original set of parents). However, in regards to Adam being made by God, can this be viewed as Adam being born from human species parents, but that only with Adam’s conception that God gave him a soul, hence making Adam the beginning of true humans (with souls). Or does the Church teach a literal point of view that Adam was made completely independently from the rest of the human species? I’ve always viewed with the creation of Adam that he was born from human species but that he was still the first true human because he was the first one to be given a soul. Is this view rejected by the Church? I still view him as one of our original parents, but that Adam was created by God via evolution (and given a soul). I know the church also accepts theistic evolution, but whether it’s acceptable to see Adam being created via evolution or whether his creation is completely independent.
God does not change in what is right and wrong. In His original creation, what is right for them should not be wrong for us. Incest is wrong, however I disagree that God allowed incest in the early days of humanity to populate the Earth. I see this analogous to committing evil (or sin) as a means to an end. If Eden and Genesis was as it should be without sin, then why would God allow something detestable to occur to populate the Earth? Does the church have a stance on this, and whether I can believe God somehow miraculously created wives for children of Adam and Eve?