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“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,” Pius wrote in his encyclical Humani Generis.

Nevertheless, some argue (i.e., Jimmy Akin) that the pope allowed some wiggle room with regard to polygenism and original sin with the highlighted phrase below, allowing for new scientific or philosophical evidence.

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 either that 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.[12]

The most devastating criticism of evolution which is never addressed is highlighted below:

5. If anyone examines the state of affairs outside the Christian fold, he will easily discover the principal trends that not a few learned men are following. Some imprudently and indiscreetly hold that evolution, which has not been fully proved even in the domain of natural sciences, explains the origin of all this, and audaciously support the monistic and pantheistic opinion that the world is in continual evolution. Communists gladly subscribed to this opinion so that, when the souls of men have been deprived of every idea of a personal God, they may the more efficaciously defend and propagate their dialectical materialism.
6. Such fictitious tenets of evolution which repudiate all that is absolute, firm and immutable, have paved the way for the new erroneous philosophy which, rivaling idealism, immanentism and pragmatism, has assumed the name of existentialism, since it concerns itself only with existence of individual things and neglects all consideration of their immutable essences.

The terms that scientists (and all people) employ in speech assume the existence of immutable essences. So when they speak of "monkeys" or "protons" they contradict themselves, if they reject the existence of fixed essences or natures. Additionally, Nominalism follows necessarily from Darwinism, and Nominalism is self-contradictory.

A final passage from Humanae Generis:

31. If one considers all this well, he will easily see why the Church demands that future priests be instructed in philosophy "according to the method, doctrine, and principles of the Angelic Doctor,"[8] since, as we well know from the experience of centuries, the method of Aquinas is singularly preeminent both for teaching students and for bringing truth to light; his doctrine is in harmony with divine revelation, and is most effective both for safeguarding the foundation of the faith, and for reaping, safely and usefully, the fruits of sound progress.[9]

Amen. It's what my kids are being homeschooled in.