29 Truly, it is hardly possible to describe how great are the evils that flow from divorce. Matrimonial contracts are by it made variable; mutual kindness is weakened; deplorable inducements to unfaithfulness are supplied; harm is done to the education and training of children; occasion is afforded for the breaking up of homes; the seeds of dissension are sown among families; the dignity of womanhood is lessened and brought low, and women run the risk of being deserted after having ministered to the pleasures of men. Since, then, nothing has such power to lay waste families and destroy the mainstay of kingdoms as the corruption of morals, it is easily seen that divorces are in the highest degree hostile to the prosperity of families and States, springing as they do from the depraved morals of the people, and, as experience shows us, opening out a way to every kind of evil-doing in public and in private life.
Source: Arcanum Divinae (Vatican.va)