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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4 September 2025

3 min read

Who’d be an MP today?

A vulnerable vocation that we should all consider

Jamie Mulvaney

Jamie is Vicar of St Michael's Chester Square, London.

MPs sit and stand in a crowded parliament.

The House of Commons sits, and stands.

Houses of Parliament.

Last year, 132 Members of Parliament headed for the exit. Of course, the reasons for this vary, but the unsustainable nature of the role must be factored in. As the Westminster Parliament returns for another session, who on earth would want to be an MP in today's day and age?

Most starkly, we saw the murders of Jo Cox and Sir David Amess, with the latter writing in 2020 that the fear of attacks "rather spoilt the great British tradition of the people openly meeting their elected politicians". Herein lies much of the issue of being an MP today: accessibility. They might be highly insulated within the Palace of Westminster, but within their phones and outside of those gates they are always available, and always on, with slings and arrows that are verbal and violent.

The combination of abuse and accessibility is a potent force. It's not limited to the MPs themselves. Dr Ashley Weinberg, an occupational psychologist from the University of Salford, said that 49.5 per cent of MPs' staff suffering from distress was double the level experienced by the general population. Those in vocation-based work need some boundaries as capes don't come with the parliamentary pass.

And if the exit sign is so alluring, how do we remove barriers to entry? In Why We Get the Wrong Politicians, Isabel Hardman writes that seeking a seat is 'the most expensive and time-consuming job interview on earth'. Only to be met by remuneration that doesn't quite make up for the package deal. Of course, there's the uber-keen. Morgan Jones, writing in The New Statesman, notes 'People who want to be MPs really want to be MPs. They are willing to try and try again: in the footnotes of the careers of many now-prominent politicians, one finds unsuccessful first tilts at parliament.'

Being adopted, working class, a mum, a carer, and a cancer survivor didn't stop Conservative MP Katherine Fletcher from standing as an MP. In fact, it all contributed to it: 'You stand on a podium and say, "Vote for me please!" To do it properly you have to bring your whole self.' The sense of calling to a vocation comes from a frustration, where she found herself yelling at the TV, intersecting with our core experiences and values.

Even with five-year terms, there's an inherent reactivity in the daily nature of being an MP. Where is the space to think? To really reflect. In a plaintive but not totally despairing summer article, Andrew Marr, the veteran observer of politics, wrote more broadly about British society: 'What is new and disorientating is that we have so few storytellers to shake us or point a way ahead… This means that we push our anxieties, our frustrated hopes and our confusion even more on to the shoulders of political leaders who are entirely unsuited to bearing the weight.' As we lack imaginative drive, 'The fault is not in our stars but in ourselves.'

We need everyone from poets to plumbers to make this society work. And there's the question of vocation: where does my gifting and passion meet the needs of our society that solves problems or inspires others to?

We rightly have high expectations of our leaders, and project our hopes and fears onto their blank canvases. But their canvasses aren't blank. They are crammed with the urgent and important. We can't expect our politicians to do and be everything - and we all need to play our part. Our blame-and-shame culture finds hysterical, theatrical representation at Prime Minister's Questions. Sir Tony Blair said that 'A private secretary would come in and say: "Well, Prime Minister, a grateful nation awaits." I would follow him out feeling as if I was going to my execution.' The agonistic, antagonistic design of the House of Commons, where one side is pitted against the other, has ripples in our society with an increasingly antagonistic public discourse.

In pointing the finger we have three pointing back at ourselves. As Jesus famously said, 'Why do you look at the speck of sawdust in your brother’s eye and pay no attention to the plank in your own eye?'

Our vote at the ballot box may be our exercise of judgement. But before scathing our members of parliament, it's worth us first asking 'what have I done as a member of the public?'

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