Just War and Just Peace

As the Ukraine War passes another milestone, can any war be considered just? Christine Schliesser explores Just War theory and a possible path to Just Peace.

Christine Schliesser

Christine Schliesser lectures in Theology and Ethics at Zurich University, and is a scientific collaborator with the Center for Faith & Society at Fribourg University.

Civilian evacuation across Irpin River during the Ukraine War.

Yan Boechat/VOA via Wikimedia Commons.

Will Germany deliver Leopard 2 tanks to Ukraine? No? Yes? When? Media discussion of the war that the Russian Federation started against Ukraine in 2014 and that entered a new stage one year ago, currently centres on questions of weaponry. Who else will send tanks? And what about fighter aircrafts? No? Yes? When?

In classical military ethics, which has long been dominated by the so called Just War Theory, these questions fall under ius in bello, the right conduct in war. This also includes discussions on proportionality, military necessity and the differentiation between combatants and non-combatants.

Just War Theory has a long tradition in Christian thought. Church Father Ambrose argued that whoever does not ward off injustice from his fellow man (or woman for that matter) when he can, is as guilty as he who commits it. Ambrose’s student, Augustine, then developed this thought in more detail as he laid the foundations for what could be called a bellum iustum, a just war.

Even before going to war, the criteria of the ius ad bellum, the right to go to war, must be satisfied. These include, for instance, a just cause, legitimate authority, prospect of success, right intention and last resort. We encounter these criteria again in slightly modified form in our modern international law. In view of these guidelines, of Russia’s breach of international law, and of Ukraine’s right to self-defence, the on-going war in Ukraine clearly seems to be a just war. Or is it?

Nothing holy or just

Two points need to be made in this discussion. Firstly, there are no just or holy wars. Period. Or as 150 churches, after the horrors of the Second World War, put it in Amsterdam in 1948: ‘War is contrary to the will of God.’ Wars are always an evil and an expression of the failure of human beings to strive for peace. This also holds true for the war in Ukraine. And this means that we need a new dimension in the debate, namely guilt.

Every action – and inaction – here involves guilt. As the German pastor Dietrich Bonhoeffer, who was killed by the Nazis for his engagement in a plot against Hitler, put it:

‘everyone who acts responsibly becomes guilty’.

And even if we become guilty for the sake of the other person, our guilt remains just the same. Yet, as Bonhoeffer concludes, we trust in the grace of God, who calls us to responsible action. , Bonhoeffer’s ideas have been considered dangerous and easily misused to justify any crime, as forgiveness is always available. Nevertheless, we must acknowledge the reality of guilt that pervades any war, including the war in Ukraine.

Just Peace

Secondly, recent years have seen a new kid on the block: Just Peace Theory. While Just War Theory looks at a conflict from the perspective of violence, Just Peace Theory puts the focus on peace. This includes adding a third set of criteria. Ius post bellum looks at justice after a war. We know that after a conflict is before a conflict. We therefore need to pay more attention to what happens after the weapons finally fall silent.

Here, the experiences of truth and reconciliation processes worldwide can help. Both dimensions belong inseparably together and both already begin during a conflict, not just after it. Truth, for example, requires the documentation of war crimes committed by all parties to ensure the prosecution of war criminals later on. And reconciliation is the conditio sine qua non for sustainable peace.

Russia’s war against Ukraine and its threats against NATO and Western countries demonstrate, not least that after the end of the Cold War, opportunities for genuine and sustainable reconciliation were missed as latent hatred, prejudices and stereotypes were allowed to linger.

Just Peace Theory emphasizes that building peace is an art and a craft. It requires specific skills, training and preparation. It also requires virtues of grace, persistence and forgiveness, Countless documented examples world-wide supply empirical proof that these methods actually work. Perhaps it is worth devoting some of the $2,113 billion (2021) of global annual military expenditure for training non-military approaches to address conflict resolution? To learn how to build peace as much as how to wage war? No? Yes? When?

Pathways to Peace

One such initiative is Pathways to Peace. Aiming at peace, justice and reconciliation in times of war, this initiative is currently being developed through the Conference of European Churches, a group of some 120 member churches in 38 countries. With their long-term involvement and intimate knowledge at the grassroot level, faith actors in civil society seem uniquely positioned to connect people, heal relationships, offer a new social imaginary and facilitate practical help.

The objectives of Pathways to Peace include among others to facilitate safe spaces for honest exchange between Ukrainian and Russian church leaders, to develop a network of church leaders and other civil society leaders for exchange on the preparation of peace or to bring together European youth, in particular Ukrainian and Russian young refugees.

The immense potential of faith actors in transforming conflict and building sustainable peace seems to have gone largely unnoticed in the public sphere. Given the prominence of faith in this conflict, it is about time that all relevant actors in our societies, including faith-based initiatives, joined forces to counter this major crisis of our time.

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Education

21 November 2025

1 min read

When universities turn their back on understanding

Axing Nottingham’s single-honours theology degree signals more than a funding issue

Arabella Moore-Smith

Arabella Moore-Smith is studying Religion, Culture and Ethics at the University of Nottingham.

A campus sign spells out Nottingham in large letters

University of Nottingham.

Two weeks ago, the University of Nottingham announced it is to axe its single-honours Undergraduate degree in Theology and Religious Studies. While the joint honours with Philosophy and Religion, Culture and Ethics remain, the fact that Theology is discounted as a subject worth keeping to study in its own right is concerning. In a world that is becoming increasingly more divided, unoptimistic and confusing, the study of Theology provides deep levels of understanding to our world, increasing hope and providing a way forward. I fail to see how the University of Nottingham can remain a respected university without offering the opportunity to study such understanding.

Studying religion and theology has been central to my personal development. I’ll never forget sitting in a classroom when it felt as if the world was opening up to me. I could understand people’s views on the afterlife halfway across the world, while simultaneously also understanding my classmates, and what they thought of these beliefs.

GCSE and A-Level Religious Education went on to show me that it is one of the few subjects that illuminates all aspects of humanity. The study of religion and theology covers literature, philosophy, psychology, sociology, history, anthropology…; the list goes on.

Often Philosophy and Theology are pitted against one another, but during my studies I discovered that the writings of Aristotle and Plato overlap with early Christian thinking, revealing to me that we are far more united in our history and beliefs than we assume. The philosophers’ discursive forms revealed not only something about the divine but also the human; the way that we argue, think, and reason. Thus, theology at its core aims to understand people, while also aiming to understand the divine; and this, I think, requires a level of fearlessness and honesty that other subjects cannot always provide.

This intrigue led me to Nottingham to study theology at degree level, and as I come to the end of my studies I know I will leave with more questions about our world and spirituality than I have answers. In particular, my life at university has provided me with the opportunity to interact with so many different types of people, and so, despite my personal faith, I know that the world shows us so many fractions of the divine in ways that aren’t quite clear. This is the beauty of studying theology; it encourages us to live in the uncomfortable. This is something that I think leads to us wanting to understand one another better.

While the cutting of theology at Nottingham shows a funding problem, this is part of a wider issue; crisis is visible all across our world. Israel-Palestine violence continues; the recent vote to release the Epstein files reveals layers of deceit in multiple leaders, and the recent murder of Charlie Kirk plummeted MAGA into a more extreme Christian nationalism. But the reporting on these kinds of stories, while important, has knock-on effects, especially for young people.

In July 2025, Unicef reported that Gen Z consume news more than any other type of content, 6 in 10 of our generation reporting to feel overwhelmed. My age group’s over-exposure to the news drives us somewhat towards a desire for change, although this determination can lead to overwhelm. I have certainly felt this myself. But this is exactly where the study of theology can provide a light within deceit and despair.

The studying of ancient holy texts and religious practices teaches me the nuances of human nature; we are sometimes good, sometimes bad. We also do not always communicate effectively. Mistranslations within texts lead to misunderstandings of the Bible, and for some people who read the Bible literally, their understanding of the Bible is their reality. Yet at the same time, by assuming that there is a God, theology seeks to understand how this indicates our need for a divine being to underpin these misunderstandings. Studying theology encourages higher tolerance levels for others’ beliefs.

While the council at the University of Nottingham may argue that it is continuing its other religion degrees, the removal of single honours theology hints at something deeper than financial issues. It shows a lack of effort to understand the value that religion has on our society today. The Israel-Palestine war, for example, is underpinned by identity and religion, and cannot be understood without sufficient education on Jewish and Palestinian history. The decision that Religious Education will be added into the new national curriculum (ironically announced the day before Nottingham’s announcement of course cuts) is a step in the right direction for the encouragement of religious education in UK schools, but without Russell Group universities like Nottingham providing a Theology degree, I am concerned for the future of religious understanding in our society.

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