United States Conference of Catholic Bishops, Forming Consciences for Faithful Citizenship 22

There are some things we must never do, as individuals or as a society, because they are always incompatible with love of God and neighbor. Such actions are so deeply flawed that they are always opposed to the authentic good of persons. These are called ‘intrinsically evil’ actions. They must always be rejected and opposed and must never be supported or condoned. A prime example is the intentional taking of innocent human life, as in abortion and euthanasia. In our nation, ‘abortion and euthanasia have become preeminent threats to human dignity because they directly attack life itself, the most fundamental human good and the condition for all others’ (Living the Gospel of Life, no. 5). It is a mistake with grave moral consequences to treat the destruction of innocent human life merely as a matter of individual choice. A legal system that violates the basic right to life on the grounds of choice is fundamentally flawed."

Ibid. 44

Human life is sacred. The dignity of the human person is the foundation of a moral vision for society. Direct attacks on innocent persons are never morally acceptable, at any stage or in any condition. In our society, human life is especially under direct attack from abortion, which some political actors mischaracterize as an issue of "women’s health." Other direct threats to the sanctity of human life include euthanasia and assisted suicide (sometimes falsely labelled as ‘death with dignity’), human cloning, in vitro fertilization, and the destruction of human embryos for research.