Germany is a democratic parliamentary federal republic of 16 states (Bundesländer). The country previously consisted of several sovereign states with their own history, culture, and religious affiliation. Germany was first unified as a nation-state amidst the Franco-Prussian War in 1871. The Federal Republic of Germany is a member state of the United Nations, NATO, the G8 and the G4 nations, and is a founding member of the European Union. It has the largest population and largest economy of all European Union member states.