The Olympic flag represents all mankind and has a white bar with 5 interlocking rings of 5 colors. The five rings represent the five continents.[7] The six colors (including the white color of the background) represent all of the world's nations.
The World Citizen is a social movement for global citizenship under a proposed world government. In 1953, one of its activists, Garry Davis, founded the World Service Authority, which issues the World Passport (considered a valid passport by only a few countries) with a proposed flag of the world.