"The Archbishop of Canterbury asked Nov. 19  whether the differences between Roman Catholicism and Anglicanism are sufficient to prevent Rome's deeper recognition of Anglican orders. The Most Rev. Rowan Williams spoke at the Gregorian University at a conference in honour of the late ecumenical leader Johannes Cardinal Willebrands. The 'ecumenical glass is genuinely half-full,' the archbishop said. 'For many of us who are not Roman Catholics, the question we want to put, in a grateful and fraternal spirit, is whether this unfinished business is as fundamentally church-dividing as our Roman Catholic friends generally assume and maintain'. .... Citing a sermon that Cardinal Willebrands delivered in Cambridge in 1970, the archbishop described a theory of primacy as a 'community of communities' and a 'communion of communions'." "Archbishop also offered a brief critique of the Vatican's apostolic constitution that will allow sojourning Anglicans to become Roman Catholics while retaining aspects of their Anglican heritage". "The archbishop devoted nearly a quarter of his address to women's ordination".