Pope Leo XIV met with His Beatitude Sviatoslav Shevchuk, Head of the Ukrainian Greek-Catholic Church, at the Apostolic Palace on February 12. Archbishop Shevchuk thanked the Pope for the Vatican's solidarity, support, and diplomatic efforts toward achieving peace in Ukraine after four years of war. Shevchuk described the Ukrainian Greek-Catholic Church as a global entity, originating in Kyiv but open to proclaiming the Gospel to all peoples through communion with the Pope. The conflict has evolved to feature technologically advanced vehicles, with casualty figures estimated by CSIS to be near two million combined deaths and injuries. Russia currently controls 20% of Ukrainian territory, including Crimea and Donbas, following slow territorial gains in 2025.
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Pope Leo XIV met with His Beatitude Sviatoslav Shevchuk, Head of the Ukrainian Greek-Catholic Church, on February 12, 2026, at the Vatican.1 Shevchuk thanked the Pope for solidarity, support, and diplomatic efforts toward a just peace amid four years of war.1
The discussion highlighted the Ukrainian Greek-Catholic Church's dual role as a particular Ukrainian church and a global entity in communion with the Pope.1
The Russian invasion, marking four years since the full-scale assault in 2022 (and ongoing since 2014), has evolved from tank battles to advanced drone warfare.1 Casualty estimates from the Center for Strategic and International Studies indicate nearly two million dead, wounded, and missing, with Russia at 1.25 million and Ukraine over 100,000 officially acknowledging 55,000 soldier deaths.1
Russia controls 20% of Ukraine, including Crimea and Donbas, gaining 1% of territory in the bloodiest year of 2025.1 Ukraine faces insignificant advances in its defensive posture, with daily Russian losses exceeding 1,000 soldiers.1
Seven million Ukrainian refugees and 3.5 million internally displaced persons have been registered.1 Twelve and a half million rely on external aid, four million children are out of school, and healthcare and energy systems are collapsing under attacks exacerbated by severe winter.1
Resentment grows with no end in sight, as civilian deaths and injuries rise.1
Kyiv endures its harshest winter in a decade, with temperatures dropping to -20°C and Russian strikes demolishing Soviet-era power plants.1 Centralized heating, electricity, and water systems fail, leaving buildings frozen, pipes burst, and residents trapped without basic amenities.1
His Beatitude Shevchuk described the situation as more dramatic than at the invasion's start, with neighborhoods losing gas, electricity, and water.1
The Ukrainian Greek-Catholic Church provides empathy through priests who have suffered personal losses, offering "healing of wounds" programs for trauma.1 These "wounded doctors" address mental, spiritual, and physical health, creating valuable experience for the universal Church.1
Priests and religious continue ministering despite grief in their own families.1
Solidarity from the universal Church, inspired by Popes Francis and Leo XIV, has sustained Ukraine, though aid fluctuated—abundant in 2022, scarce in 2025, and reviving this winter.1 Five million faced food insecurity in early 2025, but only half received help until recent surges.1
Examples include Cardinal Grzegorz Ryś of Kraków raising one million zlotys after Shevchuk's post-bombing message, emphasizing prayer and awareness across European parishes.1
How has the Catholic Church historically shaped peace efforts in war?
The Catholic Church has historically influenced peace efforts during wartime through doctrinal teachings emphasizing peace as the goal of justice, active papal mediation in international conflicts, support for diplomatic and international institutions, and promotion of prayer and moral suasion. Rooted in just war principles that subordinate force to the restoration of peace, the Church evolved from endorsing limited defensive wars in classical thought to a pronounced peacemaking mission in modern times, particularly since the 19th century, prioritizing dialogue, reconciliation, and systemic justice over violence.
Catholic teaching on war originated with thinkers like Augustine and Aquinas, who framed legitimate force as a means to restore order, justice, and peace for the common good, not as an end in itself. Aquinas systematized this by requiring wars to be authorized by legitimate authority, pursued for a just cause (e.g., repelling aggression), and conducted with right intention aimed at peace, proportionality, and discrimination between combatants and non-combatants.
For Aquinas, a just war occurs when, out of necessity, the foremost legitimate political leader authorizes the proportional use of collective armed force on behalf of the common good for a just cause with right moral intention to achieve peace.
This tradition distinguished the Church's nonviolent witness—modeled on Christ's suffering—from the state's duty to protect the innocent, creating a "division of labor" where the Church promotes supernatural peace through faith and charity. Aquinas's communitarian view saw political society as ordered toward interdependent flourishing in peace, influencing later thought.
A pivotal evolution occurred under Pius IX (1849), who rejected papal military involvement in favor of the Church's pacific mission as successor to Peter. This marked a transition: popes like Leo XIII promoted the pontiff's role "to promote peace between nations," amplified by Benedict XV's failed but persistent mediation during World War I. Post-1870 loss of papal states freed the Holy See to focus on spiritual leadership in temporal affairs.
Pius XI emphasized the Church's unique mandate to guide consciences toward God's eternal law, making war impossible by conforming nations' acts to divine justice. Benedict XV urged clearing hearts of bitterness for mutual love post-war. Pius XII invoked Mary's Immaculate Heart for heavenly aid when human efforts failed. This era conflated just war discourse with the Church's peacemaking, blending its nonviolence with calls for states to prioritize peace.
Scholars note a perceived "discontinuity": classical theory presumed against injustice (justifying defensive/offensive wars), while modern Magisterium presumes against war, as in U.S. bishops' The Challenge of Peace (1983). Yet this reflects heightened papal emphasis on peace amid total wars' horrors, not rejection of just war.
The Church has directly shaped peace through mediation, leveraging moral authority:
The Church has consistently supported the development of an international administration of justice and arbitration... Traditionally the Holy See has played the role of mediator.
John Paul II visited the International Court of Justice (1985), endorsing UN, League of Nations precursors, and guarantor roles.
Popes backed structures preventing war: Pius XII welcomed the UN; John Paul II addressed FAO, UNESCO, ILO. Paul VI saw diplomacy as key to ethical peace. The U.S. bishops (2015) urged preventing conflicts via peaceful means, rejecting torture, and addressing terror's roots while honoring just defense.
Prayer campaigns complemented action: Pius XII's "holy crusade"; John Paul II's global prayer for peace. John Paul II stressed educating consciences for openness and solidarity.
| Era | Key Peace Efforts | Examples |
|---|---|---|
| Classical (Aquinas) | Doctrinal framework subordinating war to peace | Just cause, right intention for peace |
| 19th–Early 20th C. | Papal rejection of arms; mediation beginnings | Pius IX (1849); Leo XIII, Benedict XV (WWI) |
| Post-WWII | UN support; anti-total war | Pius XII, John XXIII, Paul VI |
| Late 20th–21st C. | Direct mediations; reconciliation | JPII (Argentina-Chile, Ecuador-Peru); Francis (Colombia) |
Modern teaching integrates just war with "just peace," prioritizing prevention and reconstruction. Francis (2024) hailed Argentina-Chile treaty as fraternity's fruit. The Church aids victims, fosters dialogue, and critiques war's futility.
War is never a reflection of what ought to be but a sign that something more true to human dignity has failed.
This aligns with Aquinas's peace aim but adapts to nuclear threats and systemic injustices.
In summary, the Church has shaped peace efforts by embedding moral limits in just war theory, pioneering papal mediation, bolstering international law, and mobilizing prayer—evolving from theoretical restraint to proactive diplomacy, always faithful to Christ's peace.