Germans are the natives or inhabitants of Germany, or sometimes more broadly any people who are of German descent or native speakers of the German language. The constitution of Germany, implemented in 1949 following the end of World War II, defines a German as a German citizen. During the 19th and much of the 20th century, discussions on German identity were dominated by concepts of a common language, culture, descent, and history. The German language remains dominant in Germany, and is still widely perceived as a necessary criterion for German "national belonging". The total number of Germans in the world range is about 100 million, most of whom live in Germany.