Why has the Eucharist been both a symbol of Christian unity and a source of division?

The Eucharist is intended as a central rite of Christian worship, serving as a memorial action that recalls the life and death of Jesus Christ and fosters communion among believers. Despite this intended purpose of unity, it has historically functioned as a significant source of division and contention within Christianity due to varying doctrines and practices.12

Sources of Division

The primary disagreements regarding the Eucharist center on the nature of Christ’s presence and the requirements for participation:

• Theological Interpretations: Christian traditions differ on whether the bread and wine undergo a change in substance, such as the Roman Catholic doctrine of transubstantiation, or if they represent a "real but spiritual presence," as taught by John Calvin. Others, including some Protestant denominations, view the ritual as purely symbolic or commemorative, while groups like the Society of Friends have abandoned the practice entirely.341
• Access and Communion: Denominations disagree on who may participate. Some practice "close communion," restricting the rite to members who have met specific initiation requirements, such as adult baptism.1
• Social and Liturgical Structure: Historically, the ritual mirrored social hierarchies, with the officiating priest serving the elements in a way that reflected authority and subordination, a practice that shifted during the Reformation.2

These doctrinal and practical variations have made the Eucharist a focal point in the ecumenical movement, where churches seek to overcome historical divisions through dialogue and theological consensus.15