Just War and Peacemaking

Overview

Just war and peacemaking names a major field of Christian moral reflection about violence, political authority, enemy-love, and the pursuit of peace. It brings together biblical texts that describe the state’s duty to restrain wrongdoing with texts that call the church to nonretaliation, love of enemies, and the blessing of peacemakers. Historically the field has produced three broad approaches—nonviolent discipleship (pacifism), classical just-war reasoning, and contemporary just-peace or peacemaking strategies—that wrestle with when, if ever, coercive force under legitimate authority can be morally restrained and accountable.

Biblical shape

Scripture frames the conversation around several formative movements. Creation grounds the sanctity of life (Genesis 1:26–28), and the fall exposes human violence (Genesis 4; 6). Israel’s law limits private vengeance and regulates communal justice (Exodus, Deuteronomy), while prophetic literature alternates legal regulation with visions of the nations’ eschatological peace (Isaiah, Micah). Jesus’ teaching in the Sermon on the Mount and his passion emphasize enemy-love and nonretaliation (Matthew 5; 26:52; John 18:36), pressing the church toward peacemaking as vocation. Apostolic writings, especially Romans 12–13 and 1 Peter, contain the tension: the church renounces vengeance even as civil authority is portrayed as God’s instrument to restrain evil. The New Testament’s horizon of reconciliation and new creation (Ephesians 2; Colossians 1; Revelation 21–22) shapes Christian peacemaking as anticipatory witness.

The central dialectic is between peace and justice: refusing private vengeance while recognizing obligations to protect the vulnerable and maintain public order. Different traditions resolve this tension differently, on a spectrum from nonresistant discipleship to forms of just-war reasoning that seek to limit violence morally.

Key passages

• Genesis 1:26–28 (human life made in God’s image; grounds protection of life)
• Exodus 20:13; Deuteronomy 16:18–20 (prohibition of murder and the ordering of justice)
• Deuteronomy 20:1–20 (laws regulating warfare in Israel’s covenantal context)
• Isaiah 2:2–4; Micah 4:1–4 (prophetic vision of turning swords into plowshares)
• Matthew 5:9; Matthew 5:38–48 (beatitude for peacemakers; commands on enemy-love and nonretaliation)
• Matthew 26:52; John 18:36 (Jesus’ renunciation of violence and kingdom not advanced by the sword)
• Romans 12:14–21 (overcoming evil with good; forbidding vengeance)
• Romans 13:1–7 (governing authority bears the sword to restrain wrongdoers)
• 1 Peter 2:21–23 (Christ’s nonretaliatory example)
• Ephesians 2:14–17; Colossians 1:20 (reconciliation as the church’s eschatological vocation)

Theological significance

Theologically, the topic refuses both simplistic permissions to kill and sentimental pacifism that treats evil as merely an abstract problem. It is a discipline of moral restraint centered on several convictions drawn from Scripture and tradition:

• Human dignity and the sanctity of life (Genesis) provide the starting point for judgments about when force might be used to protect the vulnerable.
• The church’s vocation to overcome evil with good and to bear witness to Christ’s reconciling work sets high limits on violence and insists on enemy-love, repentance, and forgiveness (Sermon on the Mount; Romans 12).
• Recognition of public authority in Romans 13 has been read historically as authorizing limited coercion for the common good; traditions differ over whether and how Christians may participate in that coercive work.

Classical just-war reasoning formulates criteria—legitimate authority, just cause, right intention, last resort, proportionality, reasonable chance of success, and discrimination between combatants and noncombatants—aimed not at legitimating violence but at restraining it. Contemporary developments add jus post bellum concerns (reconstruction, reconciliation, accountability) and expand peacemaking to include conflict prevention, mediation, human rights, and restorative justice.

Different ecclesial bodies have emphasized different emphases: some stress nonviolent discipleship rooted in Christ’s life and the early church’s witness; others uphold the state’s limited duty to defend order while urging moral constraints; still others advance “just-peacemaking” practices that seek to make war obsolete by building just institutions and practices.

Pastoral implications are immediate: care for soldiers and victims, questions about conscientious objection, truth-telling and repentance for violence, and the practical work of reconciliation and restoration. Liturgical and iconographic traditions—from penitential prayers for peace to images of the crucified Christ and the Peaceable Kingdom—shape communal formation toward either nonviolence or responsibly limited coercion.

Related Atlas concepts

• just-war-theory
• pacifism
• nonviolence
• just-peacemaking
• conscientious-objection
• restorative-justice
• sermon-on-the-mount
• romans-13
• kingdom-of-god