The Second Vatican Council, in a passage which retains all its relevance today, forcefully condemned a number of crimes and attacks against human life. Thirty years later, taking up the words of the Council and with the same forcefulness I repeat that condemnation in the name of the whole Church, certain that I am interpreting the genuine sentiment of every upright conscience: “Whatever is opposed to life itself, such as any type of murder, genocide, abortion, euthanasia, or willful self-destruction, whatever violates the integrity of the human person, such as mutilation, torments inflicted on body or mind, attempts to coerce the will itself; whatever insults human dignity, such as subhuman living conditions, arbitrary imprisonment, deportation, slavery, prostitution, the selling of women and children; as well as disgraceful working conditions, where people are treated as mere instruments of gain rather than as free and responsible persons; all these things and others like them are infamies indeed. They poison human society, and they do more harm to those who practice them than to those who suffer from the injury. Moreover, they are a supreme dishonor to the Creator.”
Unfortunately, this disturbing state of affairs, far from decreasing, is expanding: with the new prospects opened up by scientific and technological progress there arise new forms of attacks on the dignity of the human being. At the same time a new cultural climate is developing and taking hold, which gives crimes against life a new and—if possible—even more sinister character, giving rise to further grave concern: broad sectors of public opinion justify certain crimes against life in the name of the rights of individual freedom, and on this basis they claim not only exemption from punishment but even authorization by the State, so that these things can be done with total freedom and indeed with the free assistance of health-care systems.
All this is causing a profound change in the way in which life and relationships between people are considered. The fact that legislation in many countries, perhaps even departing from basic principles of their Constitutions, has determined not to punish these practices against life, and even to make them altogether legal, is both a disturbing symptom and a significant cause of grave moral decline. — from Evangelium Vitae (1995)