Here’s what the Church declared through the Pontifical Biblical Commission in the early 20th century:
Concerning the Historical Character of the First Three Chapters of Genesis
June 30, 1909 (AAS 1 [1909] 567ff; EB 332ff; Dz 2121ff)
I: Do the various exegetical systems excogitated and defended under the guise of science to exclude the literal historical sense of the first three chapters of Genesis rest on a solid foundation?
Answer: In the negative.
II: Notwithstanding the historical character and form of Genesis, the special connection of the first three chapters with one another and with the following chapters, the manifold testimonies of the Scriptures both of the Old and of the New Testaments, the almost unanimous opinion of the holy Fathers and the traditional view which the people of Israel also has handed on and the Church has always held, may it be taught that: the aforesaid three chapters of Genesis Contain not accounts of actual events, accounts, that is, which correspond to objective reality and historical truth, but, either fables derived from the mythologies and cosmogonies of ancient peoples and accommodated by the sacred writer to monotheistic doctrine after the expurgation of any polytheistic error; or allegories and symbols without any foundation in objective reality proposed under the form of history to inculcate religious and philosophical truths; or finally legends in part historical and in part fictitious freely composed with a view to instruction and edification?
Answer: In the negative to both parts.
III: In particular may the literal historical sense be called in doubt in the case of facts narrated in the same chapters which touch the foundations of the Christian religion: as are, among others, the creation of all things by God in the beginning of time; the special creation of man; the formation of the first woman from the first man; the unity of the human race; the original felicity of our first parents in the state of justice, integrity, and immortality; the command given by God to man to test his obedience; the transgression of the divine command at the instigation of the devil under the form of a serpent; the degradation of our first parents from that primeval state of innocence; and the promise of a future Redeemer?
Answer: In the negative.
IV: In the interpretation of those passages in these chapters which the Fathers and Doctors understood in different manners without proposing anything certain and definite, is it lawful, without prejudice to the judgement of the Church and with attention to the analogy of faith, to follow and defend the opinion that commends itself to each one?
Answer: In the affirmative.
V: Must each and every word and phrase occurring in the aforesaid chapters always and necessarily be understood in its literal sense, so that it is never lawful to deviate from it, even when it appears obvious that the diction is employed in an applied sense, either metaphorical or anthropomorphical, and either reason forbids the retention or necessity imposes the abandonment of the literal sense?
Answer: In the negative.
VI: Provided that the literal and historical sense is presupposed, may certain passages in the same chapters, in the light of the example of the holy Fathers and of the Church itself, be wisely and profitably interpreted in an allegorical and prophetic sense?
Answer: In the affirmative.
VII: As it was not the mind of the sacred author in the composition of the first chapter of Genesis to give scientific teaching about the internal Constitution of visible things and the entire order of creation, but rather to communicate to his people a popular notion in accord with the current speech of the time and suited to the understanding and capacity of men, must the exactness of scientific language be always meticulously sought for in the interpretation of these matters?
Answer: In the negative.
VIII: In the designation and distinction of the six days mentioned in the first chapter of Genesis may the word Yom (day) be taken either in the literal sense for the natural day or in an applied sense for a certain space of time, and may this question be the subject of free discussion among exegetes?
Answer: In the affirmative.
You might also want to read what Pope Pius XII taught in
Humani Generis:
36. For these reasons
the Teaching Authority of the Church does not forbid that, in conformity with the present state of human sciences and sacred theology,
research and discussions, on the part of men experienced in both fields,
take place with regard to the doctrine of evolution, in as far as it inquires into the origin of the human body as coming from pre-existent and living matter - for the Catholic faith obliges us to hold that souls are immediately created by God. However, this must be done in such a way that the reasons for both opinions, that is, those favorable and those unfavorable to evolution, be weighed and judged with the necessary seriousness, moderation and measure, and provided that all are prepared to submit to the judgment of the Church, to whom Christ has given the mission of interpreting authentically the Sacred Scriptures and of defending the dogmas of faith.
Some however, rashly transgress this liberty of discussion, when they act as if the origin of the human body from pre-existing and living matter were already completely certain and proved by the facts which have been discovered up to now and by reasoning on those facts, and as if there were nothing in the sources of divine revelation which demands the greatest moderation and caution in this question.
- 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.
