Primary Documents Supporting FLI’s Mission


First and foremost among the doctrinal foundations of Family Life International’s pro-life mission are the three great ‘VITAE’ (latin for LIFE) documents – Humanae Vitae, Evangelium Vitae and Donum Vitae. Maintaining perfect (and infallible) teaching continuity with their predecessors, Paul VI, John Paul II and now Pope Benedict XVI have courageously guided the faithful and the world on the life issues for nearly half a century. Most often the Popes have been a solitary voice on these issues of life and death – particularly on the crucial issue of artificial contraception.



Humanae Vitae (On Human Life) – 25 July 1968

In this encyclical, subtitled On the Regulation of Birth, Pope Paul VI re-affirmed the Church’s teaching regarding married love, responsible parenthood and the continuing proscription of artificial birth control. Addressing a topic described by Pope Benedict XVI as “so controversial, yet so crucial for humanity’s future”, Humanae Vitae became a sign of contradiction but also of continuity of the Church’s doctrine. Download PDF… HERE



Evangelium Vitae (The Gospel of life) –  March 25 1995

In this encyclical Pope John Paul II reaffirmed of the value of human life and its inviolability. The encyclical gives an overview of threats to human life and illuminates the many Biblical prohibitions against killing, addressing specific actions in light of these passages, including abortion (quoting Tertullian, who called abortion “anticipated murder to prevent someone from being born”), and euthanasia (which John Paul II calls “a disturbing perversion of mercy”). The Pope then addressed social and ecological factors, stressing the importance of a society which is built around the family. Download PDF… HERE



Donum Vitae (The Gift of Life) – February 22 1987

In this instruction from Congregation for the Doctrine of the Faith, Pope Benedict XVI (then Cardinal Ratzinger) taught on respect for human life in its origin and on the dignity of procreation. This document specifically indicated that the Church was opposed to in vitro fertilization (IVF) which  provoked controversy given that IVF was relatively new at the time of this documents release. Download PDF… HERE


Further ethical controversies surrounding embryos, that emerged after Donum Vitae was released in 1987, prompted the release of the follow-up document Dignitas Personae.

Dignitas Personae (The Dignity of a Person) – June 20 2008

This document takes a critical stance against selective reduction, prenatal diagnosis, preimplantation diagnosis, in vitro fertilization, cryopreservation‎, parahumans, embryo transfer, genetic engineering and embryo donation.


Other Key Documents Supporting FLI’s Mission


Veritatis Splendor (The Splendour of Truth) – John Paul II (1993)

Encyclical by Pope John Paul II on the splendour of truth


Promoting Family & Marriage


Familiaris Consortio (The Role of the Family) – John Paul II (1981)

Apostolic Exhortation by Pope John Paul II on the Christian family in the modern world

Letter to Families – John Paul II (1994)

Letter by Pope John Paul II to families

Charter of the Rights of the Family (1983)

Vatican charter on family rights

Letter to Children – John Paul II (1994)

Letter by Pope John Paul II to children

The Truth and Meaning of Human Sexuality (1995)

Pontifical Council for the Family guidelines for education within the family.

Arcanum – Leo XIII (1880)

Encyclical by Pope Leo XIII on Christian marriage

Casti Connubii – Pius XI (1930)

Encyclical by Pope Pius XI on Christian marriage

Preparation for the Sacrament of Marriage (1996)

Pontifical Council for the Family guidelines for marriage preparation


Defending Sanctity of Life


Instruction on Respect for Human Life in its Origin and on the Dignity of Procreation

– Replies to Certain Questions of the day

The Congregation for the Doctrine of the Faith has been approached by various Episcopal Conferences or individual Bishops, by theologians, doctors and scientists, concerning biomedical techniques which make it possible to intervene in the initial phase of the life of a human being and in the very processes of procreation and their conformity with the principles of Catholic morality.

Declaration on Procured Abortion (1974)

Sacred Congregation for the Doctrine of the Faith

Persona Humana (The Human Person) (1974)

Vatican Declaration on certain questions concerning sexual ethics.

Considerations Regarding Proposals to give legal recognition to unions between homosexual persons (2003)

Vatican response to proposals to give legal recognition to homosexual unions.

Letter to the Bishops on the Pastoral Care of Homosexual Persons (1986)

Vatican letter concerning the pastoral care of homosexual persons

Declaration on Euthanasia (1980)

Sacred Congregation for the Doctrine of the Faith

Address to Midwives on the Nature of Their Profession – Pope Pius XII (1951)




Apostolicam Actuositatem – Paul VI (1965)

Decree on the Apostolate of the Laity on the nature, character, and diversity of the lay apostolate

Mulieris Dignitatem (The Dignity of Women) – John Paul II (1988)

Apostolic Letter by Pope John Paul II on the dignity and vocation of women

Letter to Women – John Paul II (1995)

Letter by Pope John Paul II to women

Letter to the Elderly – John Paul II (1999)

Letter by Pope John Paul II to the elderly

Letter to the Bishops on the Collaboration of Men and Women in the Church and World (2004)

Vatican letter on the collaboration of men and women

Gadium et Spes (Joy and Hope) – Paul VI (1965)

Vatican II: Pastoral Constitution on the Church in the Modern World

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