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Page 11

"Is Evolution an Open Question for Catholics?"
Kolbe Center for the Study of Creation

The original text of Humani Generis given in the Denzinger-Schonmetzer Latin version, para. 3896 (2327 in Denz) shows that the actual words “open question” were not used by Pius XII. The English translations published by The Wanderer (1969) and later by the McGrath Publishing Co. in The Papal Encyclicals 1939-1958 (1981) have virtually the same wording and the words “open question” are not there. Let us look again at the key reason Pius XII gave in Humani Generis for allowing the investigation:

It remains for us now to speak about these questions which, although they pertain to the positive sciences, are nevertheless more or less connected with the truths of Christian faith. In fact, not a few insistently demand that the Catholic religion take these sciences into account as much as possible. This certainly would be praiseworthy in case of clearly proved facts; but caution must be used when there is rather a question of hypotheses having some sort of scientific foundation in which doctrine contained in Sacred Scripture or in Tradition is involved. If such conjectural opinions are directly or indirectly opposed to the doctrine revealed by God, then the demand that they be recognized can in no way be admitted. For these reasons, the teaching authority does not forbid that, in conformity with the present state of human sciences and sacred theology [i.e. in 1950], research and discussions on the part of men experienced in both fields take place with regard to the doctrine of evolution insofar as it inquires into the origin of the human body as coming from pre-existent and living matter - for Catholic faith obliges us to hold that souls are immediately created by God.
Doctrine is not dependent upon scientific arguments but Pius XII himself saw that false scientific arguments could impact adversely on Origins doctrine and he saw the need to obtain a good understanding of what constitutes “evolution” scientifically and pertinent theological comments regarding any possible effect on doctrine. Just as Paul VI later also wanted a good understanding of what constitutes Pill contraception scientifically and pertinent theological comments regarding any possible effect on doctrine.

Nowadays, over fifty years later, it is easy to overlook the fact that Pius XII’s 1950 encyclical was issued three years before Crick and Watson’s 1953 announcement of the genetic code. Pius XII in 1950 did not fully understand terms like “macroevolution” and “microevolution”. How could he, when the best scientists of the day did not fully understand the terms themselves? A great deal of imprecision regarding the concept of “evolution” must have prevailed among scientists and Church scholars long before 1953 and for many years afterwards.

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