United States of Europe,
European state,
European federation, and
Federal Europe or
Federal Republic of Europe are names used to refer to several similar
hypothetical scenarios of the unification of Europe as a single sovereign
federation of
states, similar to the
United States of America, both as projected by writers of
speculative fiction and science fiction, and by political scientists, politicians, geographers, historians, and futurologists. At present, while the
European Union (EU) is not officially a federation, various academic observers regard it as having the characteristics of a federal system.