[INDENT]37. 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.
The bolded provides a degree of clarification. We are not at liberty to hold to a model which denies these truths.
[/INDENT]The “model” is from the basic evolution theory which teaches that a new human species is a large population which evolved from a previous large population. The important point is that “new populations” come from a polygenesis population. Polygenesis refers to a number of different genetic sources within a specific population. Pope Pius XII uses the word “polygenism” which cannot be accepted because it does not refer to an originating human population of two. Polygenism automatically is a population larger than two.
I do feel that the above is like a tongue twister.:banghead:
The point is that Adam and Eve did not follow the standard protocol of basic evolution theory. From the Catholic position, there are a lot of things dependent on two real sole fully-complete human founders of the human species.