TyrusX said:
It may be hard to believe, but the majority of places in the world are Jus sanguinis only. Only in the Americas there is such a thing as jus soli. I have a friend whose parents were from Poland and moved to Germany. She was born there and had no right to citzenship. She had no citzenship until her parents got canadian citizenship and sponsored her.
http://en.wikipedia.org/wiki/File:Jus_soli_world.png
France simply uses both; as for Germany, I find this very interesting because I wouldn't expect this country to allow for such a loophole where kids have "no citizenship".
People have to come from somewhere, right?
I actually thought that most countries used both; because one or the other doesn't seem to make sense to me: we have ties to where we grow up AND to our parents' culture.
Your friend was born in Poland, so unless her parents spoke polish to her, she had no ties with that country; she was likely more german than polish, so to speak.
edited: I just googled it and apparently someone born in France from foreign parents gets citizenship at 18 years old.
I'm VERY surprised.