On June 1, 2026, while millions of hectares of Ukrainian land remained contaminated by heavy metals and unexploded ordnance—some 301,000 hectares of the national territory according to recent estimates—the Dicastery for Promoting Integral Human Development published the theme of the papal message for the World Day of Prayer for the Care of Creation. Leo XIV posed an equation that his predecessors had never formulated with such clarity: war and the destruction of nature are not two parallel misfortunes. They are one and the same sin against divine creation. This diagnosis, formulated just weeks before September 1, 2026, the date of the World Day of Prayer for the Care of Creation, opens a new chapter in the papal magisterium. For the first time, the link between armed conflict and environmental degradation is placed at the heart of a solemn papal teaching. This is not a symbolic gesture. It is a theological revolution.
It is worth pausing for a moment to consider what is new in this statement. Since John XXIII and Pacem in Terris (1963), peace has been treated by the Magisterium essentially as a problem of social justice, international law and disarmament. Since Laudato Si'’ (2015), integral ecology established the idea that the environmental crisis is inseparable from economic inequality and the suffering of the poor. But war, in this grand picture of integral ecology, appeared only as a background element. Leo XIV fills this gap with prophetic boldness.
The Wounded Earth: What War Does to Creation
A toxic legacy for future generations
The facts are already overwhelming. The conflict in Ukraine—one of the most documented war zones of our time—has generated some 230 million tons of CO2 equivalent since the start of the Russian invasion. Forests are burning under shelling: in 2024 alone, 92,000 hectares were ravaged by combat-related fires, an increase of 1,181 million tons compared to previous years. Groundwater is polluted by explosive residue, and sulfur and nitrogen oxides from industrial fires contaminate the soil over hundreds of square kilometers. According to Ukrainian estimates, more than 2,400 environmental crimes have been formally recorded since the beginning of the conflict, and 301 million tons of the country's arable land could be unusable for decades due to mines and unexploded ordnance.
This picture is not exceptional: it is the norm in all modern warfare. In Vietnam, the chemical defoliants used in the 1960s rendered entire regions sterile for generations. In the Middle East, the bombing of Iraqi oil fields in 1991 produced one of the greatest atmospheric disasters of the 20th century. Wherever men wage war, the earth weeps.
This is where the Word of God intersects with geopolitics. In the Book of Revelation, the angel who pours the third bowl on the rivers sees the waters turn to blood; and the voice says, «You are righteous, O Holy One, who is and who was, for you have judged these things, because they shed the blood of saints and prophets, and you gave them blood to drink» (Revelation 16:5-6). Creation itself, in the Johannine vision, absorbs human violence. This is not a metaphor. It is a description—terrifying, prophetic—of what all war does to the natural order that God intended to be good.
Integral ecology extended to the battlefield
The concept of integral ecology, as forged by Pope Francis in Laudato Si'’ and as it was taken up and expanded upon by Leo XIV in the encyclical Magnifica Humanitas, This rests on a fundamental intuition: everything is connected. Human misery and the degradation of nature both stem from the same refusal to acknowledge our dependence on a Creator who entrusted the earth to us as a garden to cultivate and care for (Genesis 2:15). This original commandment—to cultivate and care for—is precisely the one that Leo XIV emphasized during his general audience of November 19, 2025, recalling that «the death and resurrection of Christ are the foundation of a spirituality of integral ecology.».
War, however, is the absolute opposite of this mandate. It cultivates nothing: it devastates. It preserves nothing: it destroys. By incorporating the reality of war into the corpus of integral ecology, Leo XIV does more than simply complete a doctrine—he reveals its internal logic. For how can one speak of integral ecology while remaining silent about the greatest machine for destroying the biosphere that humanity has ever invented?
Cardinal Michael Czerny, Prefect of the Dicastery for Promoting Integral Human Development, a Canadian Jesuit trained in social theology, is the architect of this synthesis. Following in the footsteps of Cardinal Peter K. Appiah Turkson, his predecessor at the head of this dicastery, Michael Czerny has consistently worked to extend the concept of integral development beyond purely economic issues. For him, as for Leo XIV, there is no sustainable development in a world at war. There is no genuine ecological conversion if we continue to devote trillions of dollars to the organized destruction of creation.
A new masterful synthesis: of Laudato Si'’ has Magnifica Humanitas
The continuity of a prophetic tradition
The path leading to the announcement of June 1, 2026, is long. For the contemporary era, it begins with John Paul II and his message for the World Day of Peace on January 1, 1990, now considered the first papal text entirely devoted to ecology. In this foundational text, Karol Wojtyła already established a link—cautious but real—between the "threats to peace" and "attacks on the respect due to nature." The logic was laid out, but it remained associative: ecology and peace converged without yet merging.
Benedict XVI explored this intuition further in his social encyclical Caritas in Veritate (2009), developing the concept of "responsibility towards creation" as a constitutive dimension of social charity. Then came Laudato Si'’ In 2015: a break in style and scope. Pope Francis offered the first major systematic synthesis of the environmental crisis in a social encyclical, showing how the degradation of the land and the deterioration of living conditions for the poor are two sides of the same structural problem. But war was still absent as an independent analytical category.
It is Laudate Deum (2023), then Magnifica Humanitas of Leo XIV, who took the plunge. By explicitly recognizing that armed conflicts constitute one of the major causes of greenhouse gas emissions, soil contamination, and the destruction of ecosystems, the Magisterium achieved a synthesis that the world situation had been calling for for decades. "There is no peace without ecology, no ecology without peace": this formula of Leo XIV does not contradict his predecessors—it fulfills them.
The unprecedented nature of the papal formula
What is truly new in the papal message for the 2026 World Day of Creation is the reciprocity of the affirmed link. Until now, one could hear: «Environmental degradation can lead to conflict»—this is the thesis of resource wars, extensively documented by political science. But Leo XIV also reverses the proposition: «Armed conflict is itself a structural cause of environmental degradation.» War is not merely a consequence of the ecological crisis; it is an active driver, perhaps the most powerful one.
This reversal has considerable theological and pastoral consequences. It means that the commitment to peace is now an act of integral ecology, and that the commitment to safeguarding creation is inseparable from the commitment to non-violence. For a Catholic, praying for creation on September 1st without praying for the cessation of wars would be inconsistent. Conversely, committing to peace while indifferent to the climate crisis would be spiritual shortsightedness. Ecology and peace are not two separate causes—they are one.
Here we think of the words of Saint Paul to the Church of Rome, in a passage less famous than his great pronouncements on grace, but of a rarely measured cosmic depth: «For the creation waits with eager longing for the revealing of the children of God. It was subjected to futility, not willingly, but because of him who subjected it, in hope of being set free from its bondage to decay and brought into the glorious freedom of the children of God» (Romans 8:19-21). War is precisely this «submission to futility» that Paul describes: humanity imposes upon creation the weight of its violence, its pride, its rejection of God. And creation «groans in the pains of childbirth» (Romans 8:22) under this weight. Leo XIV, by establishing the link between war and the destruction of nature, makes creation a named victim, whose suffering calls for a theological, and not merely a technical, response.
A complete conversion: what this message demands of us
To hear the cry of the earth and the cry of the people
Laudato Si'’ We had been taught to hear simultaneously «the cry of the earth and the cry of the poor»—a phrase that has become emblematic of integral ecology. Leo XIV’s message for the 2026 World Creation Day adds a third cry: that of peoples at war. For the victims of armed conflicts are also, almost always, the first victims of the environmental degradation they cause. The child in Kherson whose water is contaminated by shrapnel, the peasant woman in Sudan whose land is burned by militias, the fisherman in Gaza whose sea is polluted by rubble—they are both victims of war and victims of the destruction of creation. They are one and the same victim.
This perspective transforms the World Day of Prayer for the Care of Creation into something far more demanding than a prayer for forests and oceans. It makes it an act of solidarity with peoples suffering from the double violence of war and the destruction of their environment. Leo XIV thus opens a concrete pastoral path for Christian communities: it is not enough to sort one's waste and reduce one's carbon footprint—one must also pray for peace, support peace diplomacy, and reject the trivialization of armed conflict in public discourse.
Towards a spirituality of cosmic reconciliation
Leo XIV's gesture goes even further. By placing war at the heart of ecological discourse, he invokes a spirituality of reconciliation that is not only human but cosmic. The reconciliation that Christ accomplishes on the cross, according to Saint Paul, does not only concern humanity with one another and with God—it embraces all of creation. «For God was pleased to have all his fullness dwell in him, and through him to reconcile all things, whether things on earth or things in heaven, by making peace through his blood, shed on the cross» (Colossians 1:19-20). This cosmic reconciliation is not a state achieved once and for all: it is a task entrusted to the Church, to every baptized person. The violence of war, which undoes this reconciliation by simultaneously wounding humanity and the earth, is thus an active resistance to the work of Christ.
It is with this horizon in mind that Leo XIV is summoning the faithful for September 1, 2026. Not for a pietistic gesture, but for a transformative awakening. Cardinal Michael Czerny expresses this with a precision reminiscent of the Ignatian tradition of discernment: integral ecology must now integrate, in its analysis of the causes of the environmental crisis, the reality of war as a structuring factor. This is not simply adding another chapter to a textbook—it is changing the very grammar of the Christian worldview.
The prophetic boldness of this message lies in its clarity. Where other papal teachings may have seemed abstract or detached from the daily concerns of the faithful, this one is rooted in a painful and visible present. Everyone can look at the images of Ukraine, Sudan, and Yemen, and immediately understand what Leo XIV is talking about. Theology does not descend from the heavens: it rises from the wounded earth. And it is precisely there, in this shared wound of the earth and of humanity, that the 2026 World Creation Day seeks to plant its prayer—not as a consolation, but as a commitment.
✝ Biblical references
3 passages · 3 books
I am the Alpha and the Omega, the First and the Last, the Beginning and the End. (Revelation 22:13)
Vision of Christ's final victory over evil: hope for persecuted Christians.
→ Explore the Apocalypse Codex
Christ is all and in all. (Colossians 3:11)
Cosmic primacy of Christ against false doctrines and hidden life in Him.
→ Explore the Colossians Codex
The righteous will live by faith. (Romans 1:17)
Paul's great theological synthesis: sin, grace, justification, and life in the Spirit.
→ Explore the Roman Codex- The Spirit intercedes with groanings too deep for words (Romans 8:22-27)
- Proclaim the Gospel to all creation (Mark 16:15-20)
- The Spirit of him who raised Jesus from the dead dwells in you (Romans 8:8-11)
- No creature can separate us from the love of God that is in Christ (Romans 8:31b-39)
- When people love God, he himself works all things together for their good (Romans 8:26-30)
- When love comes first: Thérèse of the Child Jesus and the God who always comes first
- When the Spirit is slow to come: the school of desire according to John of Avila
- «The woman who gives birth is in pain» — Adam of Perseigne and the mysterious fruitfulness of charity
- The Holy Spirit is given only to those who truly desire it.
- When God is silent: Jesus' delay is not his abandonment
- When swords become plowshares: peace, the primary condition of ecology
- «Let us entrust them to Mary»: the Regina Caeli as an act of resistance for Eastern Christians
- When the Spirit breathes on the ashes: the Honduran Catholic Church facing the abyss
- Stone and continent: when the Sagrada Família speaks to the soul of Latin America
🌍 5 countries involved
In Palestine, Catholics represent approximately 2% of the population, a Christian minority heir to the two-thousand-year presence of the Church in the Holy Land. The Christian presence in Palestine dates back to the 1st century…
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In Russia, Catholics today represent only a tiny minority in a space dominated by Orthodoxy and a highly centralized power. The early Christian presence in the territory dates back to the conversion of…
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In Sudan, Catholics represent approximately 3% of the population in a country with a very large Muslim majority and facing a severe humanitarian crisis. Evangelization began in the 19th century with the Comboni Missionaries of Blessed Daniel…
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In Ukraine, Catholics today represent a significant minority, primarily through the Greek Catholic Church and the Latin communities in the west of the country. Christian roots go back to the conversion of…
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In the Vatican, the population is almost entirely Catholic, since this microstate exists in direct service to the universal Church. The Christian presence there dates back to the 1st century with the martyrdom and burial of Saint Peter…
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