Unity Corner With Dr Ian Watson

Unity Corner is a regular feature on Christian unity by Dr Ian Watson, County Ecumenical Officer for Norfolk and Waveney. In this reflection, he explores the link between Catholic Social Teaching, the Common Good, and Christian Unity.

Christian unity is often discussed in theological or ecclesial terms where we think about shared doctrine, common prayer, or the long journey towards reconciliation between divided churches. All of these are important. However, there is another dimension to unity that is sometimes overlooked or given secondary importance, namely the shared moral vision that Christians bring to the world. Towards the realisation of this vision, Catholic Social Teaching (CST) provides a particularly valuable way to unite Christians in their dedication to justice, human dignity, and securing the common good.

As most of you will know, Catholic Social Teaching refers to the body of reflection developed by the Catholic Church on social, economic, and political life in the light of the Gospel. It is not a single document or programme but a tradition of teaching that has developed over more than a century. Its modern foundations are usually traced back to the landmark social encyclical Rerum Novarum issued by Pope Leo XIII in 1891. That document sought to address the upheavals of industrialisation and the conditions faced by workers and the poor in the 19th century. (As an aside, one of the main reasons our current Holy Father took the name Leo reflects a similar concern over the potentially negative impact of technology and AI on contemporary society.) Anyhow, since Rerum Novarum, successive popes have continued to develop CST through a series of encyclicals reflecting on justice, peace, and the moral responsibilities of societies.

The principles of Catholic Social Teaching are also summarised in the Catechism of the Catholic Church (specifically CCC 2419–2442). They function as a moral compass for living the Christian faith in the world, and for rooting social, economic, and political ethics in Scripture and tradition. Essentially, the principles aim to uphold human dignity, solidarity, and the common good to guide justice, which places them within the Church’s wider moral tradition. At the heart of CST are several key ideas, including the dignity of every human person created in the image of God, the pursuit of the common good, solidarity with the poor and vulnerable, the principle of subsidiarity (that decisions should be made as locally as possible), and the conviction that the goods of the earth ultimately belong to all.

Although the CST principles (broadly grouped under seven headings) arise within the Catholic tradition, they resonate with the wider Christian family. For example, Anglican social thought, Methodist traditions of social holiness, Reformed concerns for justice in public life, and Orthodox reflections on the transformation of society all share similar instincts. For this reason, and in my experience, CST often functions as a natural meeting point for Christians seeking to work together for the common good. This is why I believe it to be an important driver for ecumenism in practice.

Let me expand on this claim. For many Christians, ecumenism is often and primarily seen as theological dialogue between different churches and their leaders. Clearly, such conversations happen and, for the most part, they remain important. For those of us actively involved in the practical pursuit of Christian unity, however, we have long recognised that unity also grows through common witness and shared action. When Christians work together to address poverty, injustice, environmental degradation, and social division, they discover that their commitment to the Gospel is truly shared. This realisation strengthens their relationships, binding them together in positive ways and opening up new possibilities for collaboration.

Jenny Sinclair, who founded the civic initiative Together for the Common Good (and, like me, shares the Catholic faith), provides an interesting viewpoint to back up this claim. She has written extensively about how Catholic Social Teaching can contribute to renewing public life in contemporary societies. For her, CST is more than just a set of policy recommendations; it is a vision of society built on human relationships, community, and the collective pursuit of the common good.

I think Sinclair is spot on here. At the very heart of CST lies the conviction that human flourishing depends on the health of our shared life together. This insight, at least for me, has clear implications for Christian unity. If the common good requires cooperation, solidarity, and mutual responsibility, then surely divisions within the Church (the People of God) must weaken the moral witness Christians bring to the world. On the other hand, when Christians work together across denominational lines, we demonstrate that the Gospel has the power to overcome division and build genuine community, which (I argue) is especially needed when so many people are desperately searching for meaning and purpose in their lives.

Sinclair frequently speaks about the importance of ‘civic friendship’. What she means by this are the habits of trust, responsibility, and mutual concern that allow communities to flourish in a network of relationships that require care and attention. Her view resonates with the vision expressed in recent papal teachings. The immediate examples I’m familiar with are from Pope Francis. In Fratelli Tutti, he reflects on the idea of social friendship and the need to rebuild bonds of solidarity in a fractured world. Likewise, in Laudato Si’, he calls for an ‘integral ecology’ that recognises the deep connections between environmental care, social justice, and human dignity.

You may be thinking that this is all well and good, but you may want to ask how this impacts Christian unity. Well, the important thing (at least for me) is that this language speaks to all Christians who are concerned about the moral direction of contemporary society. Churches may differ on matters of doctrine or ecclesial structure, but they will find common ground when responding to the moral challenges facing society. In my part of our East Anglia diocese (Norfolk and Waveney), I experience this regularly. Churches of many traditions collaborate in food banks, debt advice centres, refugee support initiatives, environmental projects, and community programmes aimed at addressing loneliness and isolation. These shared practical acts of service embody the very principles that Catholic Social Teaching articulates. I describe such collaboration as ecumenism in action. It complements theological dialogue by building local relationships of trust and shared purpose. When Christians serve the vulnerable together, they experience a deeper sense of communion, even when doctrinal differences remain.

One of the most fruitful ways to engage different traditions, then, is to have a shared understanding of how to serve the common good, one that is accessible across denominational boundaries. Christians need to look beyond their institutional identities to work out how (together) they can contribute to the flourishing of the communities they serve. I believe this is where CST comes in. CST does not belong exclusively to the Catholic Church. What it offers are insights that can enrich the moral reflection of the whole Christian family. This is because the core principles of CST are rooted in themes that run throughout Scripture itself. These themes include the prophetic concern for justice, the biblical vision of the human person created in God’s image, the commandment to love our neighbour, and the desire to welcome the stranger. When Christians from different denominations acknowledge this shared foundation, we stand on common ground and have a firmer footing to act and serve together.

As we continue to pray and work for the unity of the Church, Catholic Social Teaching reminds us that unity is not only something to be discussed in theological commissions or international dialogues. It is something to be lived in the everyday work of building communities marked by justice, compassion, and solidarity. The pursuit of the common good is itself a path towards unity. When Christians act together for the sake of human dignity and the wellbeing of society, they bear witness to a deeper truth: that the Gospel calls us not only into communion with God, but also into communion with one another.

Further reading:

Follow this link to read Jenny Sinclair’s latest article, Whose Side is the Church On?:

AI Image created by Dr Ian Watson

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