“Among many Orthodox Christians today it is generally accepted that the
contemporary Ecumenical Movement began with the Patriarchal Encyclical of 1920 “Unto the Churches of Christ Everywhere.” Furthermore, it is generally believed that the movement for Christian unity arose out of a search for “unity in truth” and doctrinal agreement. It will, thus, come as a surprise to many to discover that the historical record disproves both of these assertions beyond a shadow of a doubt.
History shows that the contemporary Ecumenical Movement has its roots in the Protestant missionary movement of the 19th century and its inspiration in the desire of Evangelical Protestants to achieve a “unity in fellowship” amongst themselves for greater success in the mission field. Willem Saayman, a Protestant scholar of missiology, begins his study on mission and unity with the following words: “The ecumenical movement does not derive simply from a passion for unity; it sprang from a passion for unity that is completely fused in mission.” The union of mission and ecumenism, however, was not something arrived at quickly or painlessly for the Protestant world. It grew slowly in the soil of global confessional alliances and community agreements among the Protestants in the second half of the 19th century, and continued in the international student movements and missionary conferences, becoming a new paradigm of ecclesiastical unity – for the conversion of the world. It became, from 1910 onwards, the basis upon which the Ecumenical Movement was built.
It is, thus, apparent that, long before the 1920 encyclical was sent out and the Orthodox entered into the discussion, the presuppositions and parameters of encounter were set and they did not, even in the slightest, reflect or even acknowledge Orthodox ecclesiological principles. The ecclesiological framework in which the ecumenical movement was forged, formed, developed and exists to this day is, with slight adjustments, the product of 19th century Evangelicalism.”- Fr. Peter Alban Heers
-Fr. Peter works out the details of this history in his paper The Missionary Origins of Modern Ecumenicism: Milestones leading up to 1920.