The original proposal for a Paneuropean Union was made in 1922 by Richard von Coudenhove-Kalergi. The term "Pan-European" is to be understood not as referring to the modern geographic definition of the continent of Europe but in the historical sense of the western parts of continental Europe sharing the common history of Latin Christendom, the Carolingian Empire and the early modern Habsburg Empire. Coudenhove-Kalergi saw the Pan-European state as a future "fifth great power", in explicit opposition to the Soviet Union, "Asia", Great Britain and the United States (as such explicitly excluding both the British Isles and Eastern Europe from his notion of "Pan-European").[5]