20th century Eastern Orthodox theology has been dominated by neo-Palamism, the revival of St. Palamas and hesychasm. John Behr characterizes Orthodox theology as having been "reborn in the twentieth century." Norman Russell describes Orthodox theology as having been dominated by an "arid scholasticism" for several centuries after the fall of Constantinople. Russell describes the postwar re-engagement of modern Greek theologians with the Greek Fathers with the help of diaspora theologians and Western patristic scholars. A significant component of this re-engagement with the Greek Fathers has been a rediscovery of Palamas by Greek theologians who had previously been given less attention than the other Fathers.
According to Michael Angold, the "rediscovery of [Palamas'] writings by theologians of the last century has played a crucial role in the construction of present-day Orthodoxy. Bishop Kallistos (Ware) has predicted that "the twentieth century will be remembered as the century of Palamas".
After the Russian Revolution, many Orthodox theologians fled Russia and founded centers of Orthodox theology in the West. The most notable of these were the Orthodox Theological Institute of St. Serguis in Paris and Orthodox Seminary of St. Vladimir in New York. Daniel Payne asserts that, in the 1940s, "Russian émigré theologians rediscovered the ascetic-theology of St. Gregory Palamas." From this rediscovery, according to Payne, "Palamas' theology became the basis for an articulation of an Orthodox theological identity apart from Roman Catholic and Protestant influences. Florovsky and Lossky opposed the efforts of the Slavophile movement to identify a uniquely Russian approach to Orthodox theology. They advocated instead a return to the Greek fathers in what Florovsky called a "Neo-Patristic Synthesis". Payne characterizes the work of Georges Florovsky and Vladimir Lossky as having "set the course for Orthodox theology in the twentieth century."
Metropolitan Hilarion Alfayev identifies five main streams within the theology of the “Paris school”.
The first, associated with the names of Archimandrite Cyprian (Kern), Fr. Georges Florovsky, Vladimir Lossky, Archbishop Basil (Krivocheine) and Fr. John Meyendorff, was dedicated to the cause of “Patristic revival.”
The second stream, represented in particular by Fr. Sergius Bulgakov, is rooted in the Russian religious renaissance of the late nineteenth and early twentieth century; here, the influence of Eastern patristics was interwoven with German idealism and the religious views of Vladimir Soloviev stream.
The third prepared the ground for the “liturgical revival” in the Orthodox Church and is related to the names of Fr. Nicholas Afanassieff and Fr. Alexander Schmemann.