This traditional approach towards Byzantium has been partially or wholly disputed and revised by modern studies, which focus on the positive aspects of Byzantine culture and legacy. Averil Cameron regards as undeniable the Byzantine contribution to the formation of medieval Europe, and both Cameron and Obolensky recognise the major role of Byzantium in shaping Orthodoxy, which in turn occupies a central position in the history, societies and culture of Greece, Romania, Bulgaria, Russia, Georgia, Serbia and other countries.. The Byzantines also preserved and copied classical manuscripts, and they are thus regarded as transmitters of classical knowledge, as important contributors to modern European civilisation, and as precursors of both Renaissance humanism and Slavic-Orthodox culture. Some scholars focused on the positive aspects of Byzantine culture and legacy, French historian Charles Diehl describes the Byzantine Empire by saying:
