The Ecumenism Debate in Orthodoxy

The Orthodox world is deeply divided over the question of ecumenism – participation in inter-Christian dialogue and organizations such as the World Council of Churches (WCC). Positions range from fierce rejection (ecumenism as “the heresy of heresies”) to cautious engagement for purposes of Orthodox witness, to more open participation in the search for Christian unity. This file presents all major positions fairly, as each represents a significant current within contemporary Orthodoxy. ROCOR’s distinctive trajectory – from sharp anti-ecumenism to a more complex stance after 2007 – is traced in detail.

Tradition: Pan-Orthodox (all positions represented)

The Spectrum of Orthodox Positions

Orthodox attitudes toward ecumenism can be broadly grouped into three positions, though there is significant variation within each:

  1. Anti-ecumenist: Ecumenism is an ecclesiological heresy that must be rejected outright
  2. Critical engagement: Participation in dialogue for Orthodox witness, without compromising ecclesiology
  3. Open dialogue: Genuine engagement seeking Christian unity while maintaining Orthodox truth

The Anti-Ecumenist Position

Theological Foundations

The anti-ecumenist argument rests on several theological principles:

1. The Church is one and undivided. The Orthodox Church is the one, holy, catholic, and apostolic Church. The Church has never been divided – those who separated from Orthodoxy departed from the Church, not from a fragment of it. The classic patristic statement is St. Cyprian of Carthage: the Church’s unity cannot be torn apart, and “he can no longer have God for his Father, who has not the Church for his mother” (Cyprian, On the Unity of the Church 6 [ANF V]). Therefore, “ecumenism” – which implies that the Church is divided and needs reunification – is based on a false premise.

2. The Branch Theory is heretical. The ecumenical movement, particularly the WCC, is perceived as implicitly or explicitly endorsing the Branch Theory – that various Christian confessions (Orthodox, Catholic, Protestant) are all “branches” of the one Church. This is incompatible with Orthodox ecclesiology. The Orthodox Church does not regard itself as one branch among many but as the fullness of the Church.

3. Joint prayer with heterodox is forbidden by the canons. The anti-ecumenists cite:

  • Apostolic Canon 45: “Let a bishop, presbyter, or deacon who has only prayed with heretics be excommunicated. But if he has permitted them to perform any clerical office, let him be deposed.”
  • Apostolic Canon 65: “If any clergyman or layman shall enter into a synagogue of Jews or of heretics to pray, let the former be deposed and the latter excommunicated.”
  • Canon 33 of the Council of Laodicea: “No one shall join in prayers with heretics or schismatics” (trans. NPNF II/14).

Participation in WCC assemblies, joint worship services, and common prayer with non-Orthodox Christians is seen as a direct violation of these canons.

4. Ecumenism leads to indifferentism. The anti-ecumenists argue that decades of ecumenical dialogue have produced no conversions to Orthodoxy and have instead fostered the attitude that all churches are essentially equivalent – a form of ecclesiological relativism that undermines the Orthodox claim to be the one true Church.

ROCOR’s 1983 Anathema Against Ecumenism

The most significant institutional expression of Orthodox anti-ecumenism is the Anathema Against Ecumenism proclaimed by the ROCOR Bishops’ Council in 1983. Added to the Rite of the Triumph of Orthodoxy (celebrated on the First Sunday of Great Lent), it reads:

“To those who attack the Church of Christ by teaching that Christ’s Church is divided into so-called ‘branches’ which differ in doctrine and way of life, or that the Church does not exist visibly, but will be formed in the future when all ‘branches’ or sects or denominations and even religions will be united into one body; and who do not distinguish the priesthood and mysteries of the Church from those of the heretics, but say that the baptism and eucharist of heretics is effectual unto salvation; who deliberately have communion with the aforementioned heretics or who advocate, disseminate, or defend the heresy of ecumenism under the pretext of brotherly love or the supposed unification of separated Christians: Anathema!”

This anathema was a defining statement of ROCOR’s theological identity during the period of separation from Moscow. Its status after the 2007 reunion is discussed below.

Key Anti-Ecumenist Voices

  • St. Justin (Popovich) of Chelije (1894-1979): Serbian theologian and monk who called ecumenism “the generic name used for the pseudo-Christianities, the pseudo-churches, of Western Europe,” whose “generic Evangelical term… is panheresy” (Justin Popovich, The Orthodox Church and Ecumenism, Greek ed., Thessaloniki: Orthodoxos Kypsele, 1974).
  • Elder Paisios of Mount Athos (1924-1994): widely venerated Athonite elder who expressed strong reservations about ecumenical engagement
  • Mount Athos generally: the monastic republic has been a center of anti-ecumenist sentiment, with several monasteries and hermitages issuing statements against participation in the WCC and interfaith prayer
  • Greek Old Calendarists (various groups): separated from the official Church of Greece over the calendar change (1924) and broader ecumenist tendencies; most are firmly anti-ecumenist
  • The Orthodox Churches of Georgia and Bulgaria: under strong internal anti-ecumenist pressure, the Georgian Orthodox Church withdrew from the WCC on May 20, 1997 – the first Orthodox church to do so – and the Bulgarian Orthodox Church followed by decision of its Holy Synod on April 9, 1998 (WCC records; the Bulgarian Synod stated that the hopes placed in WCC membership “have not been fully justified”)
  • Metropolitan Hierotheos (Vlachos) of Nafpaktos: a hierarch of the Church of Greece who participates in conciliar life rather than rejecting it, but who has voiced serious theological critiques of ecumenical formulations – at the 2016 Crete Council he declined to sign the document “Relations of the Orthodox Church with the Rest of the Christian World,” objecting that it failed to draw a clear line between the Orthodox Church and heterodox communities (his published explanations of 2016-2017); his position is nuanced and resists simple “anti-ecumenist” categorization

The Critical Engagement Position

Theological Foundations

The critical engagement position holds that:

1. Dialogue is not union. The Orthodox Church can and should engage in theological dialogue with other Christians without this implying any recognition of their ecclesial status or any compromise of Orthodox ecclesiology. Dialogue is an opportunity for witness – to explain and proclaim the Orthodox faith to those outside the Church.

2. The canons against praying with heretics must be understood in context. The ancient canons were directed against specific situations (typically, Orthodox clergy participating in heretical worship in a way that implied acceptance of heresy). Formal theological dialogue, conducted under the supervision of the Holy Synod, is a different matter. The canon against prayer with heretics does not prohibit all contact or conversation.

3. The Orthodox have a pastoral responsibility to the heterodox. Christ commands the Church to preach the Gospel to all nations. Engaging in dialogue is a form of missionary outreach – not compromising the faith but offering it to those who seek.

4. Participation need not imply endorsement. Orthodox participation in the WCC or bilateral dialogues does not mean accepting the Branch Theory or treating other confessions as ecclesially equivalent to Orthodoxy. The Orthodox can participate on their own terms, using these forums to articulate the Orthodox position.

Key Voices

  • Fr. Georges Florovsky (1893-1979): one of the most important Orthodox theologians of the 20th century, who participated actively in the ecumenical movement from its inception. Florovsky argued that the Orthodox must participate precisely because they possess the fullness of the faith and have a duty to witness to it. However, he insisted on maintaining the Orthodox ecclesiological claim without dilution (Florovsky, Ecumenism I: A Doctrinal Approach, vol. 13 of The Collected Works of Georges Florovsky, Vaduz: Büchervertriebsanstalt, 1989).
  • Fr. Alexander Schmemann (1921-1983): participated in ecumenical dialogue while maintaining strong Orthodox ecclesiological claims
  • Fr. John Meyendorff (1926-1992): similarly engaged in ecumenical theology while insisting on the distinctiveness of the Orthodox position

The More Open Position

Theological Foundations

Some Orthodox theologians and hierarchs advocate for a more genuinely open engagement with other Christians, characterized by:

1. Recognition of the real, if imperfect, Christianity of other traditions. While maintaining that the fullness of the Church subsists in Orthodoxy, this position acknowledges that elements of truth, grace, and authentic Christian life exist in other traditions. The boundaries of the Church are not simply coterminous with the visible boundaries of the Orthodox institution.

2. Genuine hope for unity. Dialogue is not merely witness but a sincere search for the restoration of full communion – particularly with the Roman Catholic Church and the Oriental Orthodox Churches, with whom the theological distance is smallest.

3. Humility about Orthodox failings. The Orthodox Church, while possessing the fullness of the faith, has not always lived up to its own teaching. Self-criticism and repentance are appropriate within ecumenical engagement.

The Ecumenical Patriarchate’s Role

The Ecumenical Patriarchate of Constantinople has been the most active Orthodox participant in the ecumenical movement:

  • A founding member of the World Council of Churches (Amsterdam, 1948); the Moscow Patriarchate, initially hostile, joined at the WCC’s Third Assembly in New Delhi on November 30, 1961, and most other Local Churches entered in the same period
  • Issued the 1920 encyclical Unto the Churches of Christ Everywhere, calling for cooperation among Christian churches (often regarded as a foundational document of the ecumenical movement); it was issued synodally while the patriarchal throne was vacant, under the Locum Tenens Metropolitan Dorotheos of Prousa
  • Patriarch Athenagoras I and Pope Paul VI met in Jerusalem in January 1964 and then lifted the mutual anathemas of 1054 in the Joint Catholic-Orthodox Declaration of December 7, 1965, read simultaneously at St. Peter’s in Rome and at the Phanar; on the Catholic side this followed the Second Vatican Council’s Decree on Ecumenism, Unitatis Redintegratio (November 21, 1964), which describes the Orthodox as “separated Churches” possessing true sacraments, “above all – by apostolic succession – the priesthood and the Eucharist” (Unitatis Redintegratio 15)
  • Patriarch Bartholomew I has continued active ecumenical engagement

Key Voices

  • Metropolitan John (Zizioulas) of Pergamon: major theologian who has been deeply involved in ecumenical dialogue, particularly the Orthodox-Catholic theological commission
  • Patriarch Bartholomew I: has emphasized the imperative of dialogue and reconciliation
  • Olivier Clément (1921-2009): French Orthodox lay theologian, longtime professor at the St. Sergius Institute in Paris, of the Ecumenical Patriarchate tradition, who advocated for open dialogue

The 2016 Pan-Orthodox Council (Crete)

Background

The Holy and Great Council met in Crete in June 2016. It was the first pan-Orthodox gathering of this kind in over a millennium and was convened by Ecumenical Patriarch Bartholomew after decades of preparation.

The Document on Ecumenism

The Council produced a document titled “Relations of the Orthodox Church with the Rest of the Christian World.” Key elements:

  • Affirmed the Orthodox Church’s participation in the ecumenical movement as a matter of witness and responsibility, not compromise
  • Stated that, “Remaining faithful to her ecclesiology, to the identity of her internal structure, and to the teaching of the ancient Church of the Seven Ecumenical Councils, the Orthodox Church’s participation in the WCC does not signify that she accepts the notion of the ‘equality of Confessions,’ and in no way is she able to accept the unity of the Church as an inter-confessional compromise” (Relations of the Orthodox Church with the Rest of the Christian World, §18)
  • Affirmed the value of bilateral theological dialogues
  • Endorsed continued participation in the WCC, while quoting the Toronto Statement that the WCC “does not by any means constitute a ‘super-Church’” (§19)
  • Stated that “the Orthodox Church accepts the historical name of other non-Orthodox Christian Churches and Confessions that are not in communion with her” (§6) – the use of the word “Churches” for these communities became a major point of controversy

Criticism of the Crete Document

The Crete document was criticized from multiple directions:

Anti-ecumenist critique:

  • The use of the word “churches” for heterodox communities is seen as an implicit endorsement of the Branch Theory
  • The document does not clearly state that the Orthodox Church is the sole Church of Christ
  • Continued participation in the WCC is unacceptable
  • The document effectively legitimizes ecumenism despite its qualifications

Critique from absent churches:

  • The Russian Orthodox Church, the Georgian Orthodox Church, the Bulgarian Orthodox Church, and the Patriarchate of Antioch did not attend the Council
  • The Moscow Patriarchate’s Holy Synod, meeting in extraordinary session on June 13, 2016, called for the Council to be postponed after Antioch, Bulgaria, Georgia, and Serbia declined to attend (Serbia later attended), arguing that holding it without the assent of all the Local Churches violated the principle of pan-Orthodox consensus that had governed the preparatory process; when Constantinople declined to postpone, Moscow did not attend (Statement of the Holy Synod of the Russian Orthodox Church, June 13, 2016; mospat.ru)
  • Antioch’s non-attendance was related to its jurisdictional dispute with the Patriarchate of Jerusalem over Qatar
  • The absence of these churches (particularly Russia, comprising roughly half of the world’s Orthodox Christians) has raised serious questions about the council’s authority and reception

Moderate critique:

  • Some theologians who support dialogue nevertheless found the document insufficiently clear in its ecclesiological claims
  • The compromise language was seen as satisfying no one fully

The Question of the Council’s Authority

The 2016 Council was styled as a “Holy and Great Council,” not an Ecumenical Council. Its authority is a matter of ongoing debate:

  • Supporters argue it was a legitimate pan-Orthodox conciliar act, binding on all Orthodox churches
  • Critics argue that without the participation of several major churches, it cannot claim pan-Orthodox authority
  • The process of reception is ongoing – the Council’s authority will ultimately be determined by whether the Orthodox faithful receive its decisions

ROCOR’s Current Position

The 1983 Anathema and Its Aftermath

The 1983 Anathema Against Ecumenism was a cornerstone of ROCOR’s identity during the period of separation from Moscow. However, its status has become more complex since the 2007 reunion with the Moscow Patriarchate.

Before 2007: The anathema was proclaimed annually at the Triumph of Orthodoxy service in ROCOR parishes. It expressed ROCOR’s conviction that the Moscow Patriarchate’s participation in the WCC was a serious canonical and theological error.

After 2007: The reunion with Moscow created a tension: ROCOR reunited with a church that actively participates in the ecumenical movement. The Act of Canonical Communion did not explicitly require ROCOR to retract the 1983 Anathema, and some ROCOR bishops and parishes continue to proclaim it. However:

  • ROCOR has not issued a formal retraction of the anathema
  • Already before the reunion, ROCOR’s own first hierarch limited the anathema’s scope: Metropolitan Vitaly (Ustinov) explained that it was of local rather than universal force – “We proclaimed an anathema against ecumenism only for the children of our Church, but by this we very humbly but firmly, gently but decisively, as if invite the local churches to stop and think” (Metropolitan Vitaly, Nativity Epistle, 1986)
  • The practical significance of the anathema within ROCOR varies by diocese and parish
  • ROCOR does not itself participate in the WCC or bilateral ecumenical dialogues

Navigating Between Heritage and Communion

ROCOR finds itself in a distinctive position:

  • Its theological heritage is firmly anti-ecumenist, rooted in the witness of the Russian diaspora against both communist persecution and Western theological liberalism
  • Its canonical communion with Moscow connects it to a church that takes a more moderate position on ecumenical engagement
  • Its faithful include many who were drawn to ROCOR precisely because of its anti-ecumenist stance and who regard any softening of this position as a betrayal
  • The 2007 Act of Canonical Communion preserved ROCOR’s self-governance, including its right to maintain its own theological emphases, but the question of how far this self-governance extends on the ecumenism question remains sensitive

In practice, ROCOR maintains a conservative stance: it does not participate in ecumenical organizations, its clergy generally do not engage in joint prayer with heterodox Christians, and the anti-ecumenist phronema (mindset) remains strong in its parishes and monasteries.

Assessment

The ecumenism debate reveals deep tensions within contemporary Orthodoxy:

  • Ecclesiological tension: How to maintain the claim to be the one true Church while engaging with other Christians in a world of religious pluralism
  • Canonical tension: How to apply ancient canons against prayer with heretics in a modern context of inter-Christian dialogue
  • Pastoral tension: How to welcome converts and seekers without compromising the Church’s self-understanding
  • Political tension: The ecumenism question is entangled with geopolitical rivalries, particularly between Constantinople and Moscow
  • Generational tension: Younger Orthodox in the diaspora may have different attitudes toward ecumenism than their elders

No resolution is in sight. The question of the Church’s relationship to other Christians will likely remain one of the most contested issues in Orthodoxy for the foreseeable future.

See Also

References

  • ROCOR Bishops’ Council, Anathema Against Ecumenism (1983); Metropolitan Vitaly (Ustinov), Nativity Epistle (1986)
  • Holy and Great Council (Crete, 2016), Relations of the Orthodox Church with the Rest of the Christian World (official text at holycouncil.org)
  • Statement of the Holy Synod of the Russian Orthodox Church, June 13, 2016; Statement on the Council in Crete, July 15, 2016 (mospat.ru)
  • St. Cyprian of Carthage, On the Unity of the Church, trans. ANF V
  • St. Justin (Popovich) of Chelije, The Orthodox Church and Ecumenism (Greek ed., Thessaloniki: Orthodoxos Kypsele, 1974; Eng. trans. Birmingham: Lazarica Press, 2000)
  • Georges Florovsky, Ecumenism I: A Doctrinal Approach, vol. 13 of The Collected Works of Georges Florovsky (Vaduz: Büchervertriebsanstalt, 1989)
  • John Meyendorff, The Orthodox Church: Its Past and Its Role in the World Today (1962, revised editions)
  • Ecumenical Patriarchate, Encyclical Unto the Churches of Christ Everywhere (1920)
  • Apostolic Canons 45 and 65; Canon 33 of Laodicea, trans. NPNF II/14
  • Second Vatican Council, Unitatis Redintegratio (November 21, 1964)
  • Joint Catholic-Orthodox Declaration of Pope Paul VI and Patriarch Athenagoras I (December 7, 1965)
  • World Council of Churches records on Orthodox membership (Constantinople 1948; Moscow 1961; Georgian withdrawal May 20, 1997; Bulgarian withdrawal April 9, 1998)
  • Act of Canonical Communion between the Moscow Patriarchate and ROCOR (May 17, 2007)
  • Kallistos Ware, The Orthodox Church (revised editions)
  • John Zizioulas, Being as Communion (1985)