Casti Connubii

…the encyclical of Pius XI Casti Connubii (1930; “On Christian Marriage”) and in the encyclical of Paul VI Humanae Vitae (1968; “On Human Life”), completely rejected any kind of contraception, a position confirmed by Paul’s successors as pope in the late 20th and early 21st centuries. Modern economic and population…

…example, the 1930 papal encyclical Casti connubii condemned reproductive sterilization, though it did not specifically prohibit positive eugenic attempts to amplify the inheritance of beneficial traits. Many Protestant writings sought to reconcile age-old Christian warnings about the heritable sins of the father to pro-eugenic ideals. Indeed, most of the religion-based…