The Russian Orthodox Church (ROC) faced various iterations of modernization throughout its history. This conflicted encounter continues in the ROC's current resistance against-what it perceives as-Western modernity including liberal and secular values. This study examines the historical development of the ROC's arguments against-and sometimes preferences for-modernization and analyses which positions ended up influencing the official doctrine. The book's systematic analysis of dogmatic treatises shows the ROC's considerable ability of constructive engagement with various aspects of the modern world. Balancing between theological traditions of unity and plurality, the ROC's today context of operating within an authoritarian state appears to tip the scale in favour of unity.