The consistent life ethic, or the consistent ethic of life is an ideology that opposes abortion, capital punishment, assisted suicide, and euthanasia. Adherents are opposed, at the very least, to unjust war, while some adherents also profess pacifism, or opposition to all war. The term was popularized in 1983 by the Catholic Cardinal Joseph Bernardin to express an ideology based on the premise that all human life is sacred and should be protected by law.
The phrase "consistent ethic of life" was used as far back as a 1971 speech delivered by then-Archbishop Humberto Medeiros of Boston.
In 1971, Roman Catholic pacifist Eileen Egan coined the phrase "seamless garment" to describe a holistic reverence for life. The phrase is a Bible reference from John 19:23 to the seamless robe of Jesus, which his executioners did not tear apart. The seamless garment philosophy holds that issues such as abortion, capital punishment, militarism, euthanasia, social injustice, and economic injustice all demand a consistent application of moral principles that value the sacredness of human life. "The protection of life", said Egan, "is a seamless garment. You can't protect some life and not others." Her words were meant to challenge those members of the pro-life movement who were in favor of capital punishment.
J. Bryan Hehir, staff writer for the United States Conference of Catholic Bishops on political affairs, is credited by Charles Curran with coining the term "consistent ethic of life"