Peter De Mey has held the chair of Ecclesiology and Ecumenism at KU Leuven, Belgium since 2002. He was a member of the first steering committee of the Ecclesiological Investigations group of the American Academy of Religion (AAR) and is still a member of the steering committee of the Ecclesiological Investigations International Network. He is the co-founder, together with Massimo Faggioli, of the Vatican II Studies group within AAR.Judith Gruber is Professor of Systematic Theology at KU Leuven, Belgium, and the director of KU Leuven’s Centre for Liberation Theologies.

• I: Stumbling blocks for ecumenism.- 1: Triumphalistic Temptations and the Sinfulness of the Church.- 2: Roman Catholic Recognition of Ecclesiality Outside its Boundaries: What Does It Mean?- 3: Peter De Mey (KU Leuven, Belgium), “More than an Issue of Translation: The ‘defectus ordinis’ in Unitatis Redintegratio 22.- 4: Response.- II: Stumbling blocks for interfaith dialogue.- 5: Salvation Optimism and Its Limits: A Reading of Lumen Gentium 16.- 6: Nostra Aetate 2: Between Dialogue and Proclamation.- 7: Response: Hard Sayings: New Questions for a Pilgrim Church.- III: Stumbling blocks for Church-world relations.- 8: Opening to the World: The ‘Special Character’ of the Laity.- 9: Downright Pelagian? Gaudium et Spes 17 and the Discussion on Who is ‘in Possession’ of Conscience.- 10: Concealing … more than revealing”: Gaudium et Spes 19 and the Sinfulness of the Church.-11: Response: A Pilgrim Church in and for the World: Eschatological Ecclesiology and the Legacy of Vatican II.

Peter De Mey has held the chair of Ecclesiology and Ecumenism at KU Leuven, Belgium since 2002. He was a member of the first steering committee of the Ecclesiological Investigations group of the American Academy of Religion (AAR) and is still a member of the steering committee of the Ecclesiological Investigations International Network. He is the co-founder, together with Massimo Faggioli, of the Vatican II Studies group within AAR.Judith Gruber is Professor of Systematic Theology at KU Leuven, Belgium, and the director of KU Leuven’s Centre for Liberation Theologies.

• I: Stumbling blocks for ecumenism.- 1: Triumphalistic Temptations and the Sinfulness of the Church.- 2: Roman Catholic Recognition of Ecclesiality Outside its Boundaries: What Does It Mean?- 3: Peter De Mey (KU Leuven, Belgium), “More than an Issue of Translation: The ‘defectus ordinis’ in Unitatis Redintegratio 22.- 4: Response.- II: Stumbling blocks for interfaith dialogue.- 5: Salvation Optimism and Its Limits: A Reading of Lumen Gentium 16.- 6: Nostra Aetate 2: Between Dialogue and Proclamation.- 7: Response: Hard Sayings: New Questions for a Pilgrim Church.- III: Stumbling blocks for Church-world relations.- 8: Opening to the World: The ‘Special Character’ of the Laity.- 9: Downright Pelagian? Gaudium et Spes 17 and the Discussion on Who is ‘in Possession’ of Conscience.- 10: Concealing … more than revealing”: Gaudium et Spes 19 and the Sinfulness of the Church.-11: Response: A Pilgrim Church in and for the World: Eschatological Ecclesiology and the Legacy of Vatican II.