The Western world, also known as the West and the Occident (from Latin: occidens ""sunset, West""; as contrasted with the Orient), is a term referring to different nations depending on the context. There are many accepted definitions about what they all have in common.The concept of the Western part of the earth has its roots in Greco-Roman civilization in Europe, and the advent of Christianity. In the modern era, Western culture has been heavily influenced by the traditions of the Renaissance, Protestant Reformation, Age of Enlightenment—and shaped by the expansive colonialism of the 15th-20th centuries. Before the Cold War era, the traditional Western viewpoint identified Western Civilization with the Western Christian (Catholic-Protestant) countries and culture. Its political usage was temporarily changed by the antagonism during the Cold War in the mid-to-late 20th Century (1947–1991).The term originally had a literal geographic meaning. It contrasted Europe with the linked cultures and civilizations of the Middle East and North Africa, South Asia, Southeast Asia and the remote Far East, which early-modern Europeans saw as the East. Today this has little geographic relevance since the concept of the West has been expanded to include the former European colonies in the Americas, Russian Northern Asia, Australia, and New Zealand.In the contemporary cultural meaning, the phrase ""Western world"" includes Europe, as well as many countries of European colonial origin with substantial European ancestral populations in the Americas, Asia and Oceania.