According to Catholicism, is Adam or Eve more culpable for original sin? From a Catholic perspective:

Is there a shared culpability between Adam and Eve for original sin, or is only Adam or Eve ultimately responsible?

Please, link answers from Catholic sources.

(You can comment the question with non Catholic perspective, as it will be interesting, but it's not my main question)
Adam and Eve are both responsible for original sin.
Adam and Eve both sinned by pride, but Eve had more pride and Adam more culpability.
St. Thomas Aquinas writes in Summa Theologica II-II q. 163 a. 4 co. on whether Adam or Eve sinned more grievously:

the gravity of a sin depends on the species rather than on a circumstance of that sin. Accordingly we must assert that, if we consider the condition attaching to these persons, the man's sin is the more grievous, because he was more perfect than the woman.*

*viz., Adam should have known better and corrected Eve.

As regards the genus itself of the sin, the sin of each is considered to be equal, for each sinned by pride. Hence Augustine says (Gen. ad lit. xi, 35): &quot;Eve in excusing herself betrays disparity of sex, though parity of pride.&quot;
But as regards the species of pride, the woman sinned more grievously, for three reasons:

Because she was more puffed up than the man. For the woman believed in the serpent's persuasive words, namely that God had forbidden them to eat of the tree, lest they should become like to Him; so that in wishing to attain to God's likeness by eating of the forbidden fruit, her pride rose to the height of desiring to obtain something against God's will. On the other hand, the man did not believe this to be true; wherefore he did not wish to attain to God's likeness against God's will: but his pride consisted in wishing to attain thereto by his own power.

The woman not only herself sinned, but suggested sin to the man; wherefore she sinned against both God and her neighbor.

The man's sin was diminished by the fact that, as Augustine says (Gen. ad lit. xi, 42), &quot;he consented to the sin out of a certain friendly good-will, on account of which a man sometimes will offend God rather than make an enemy of his friend. That he ought not to have done so is shown by the just issue of the Divine sentence.&quot;


It is therefore evident that the woman's sin was more grievous than the man's.

Also, only Adam is responsible for transmitting original sin to his descendants.