Citizenship is a matter of law. To become an American citizen is a matter of the Constitution. If you are born in the USA, you are an American. Also, if you are born of American citizens in a foreign country, you are also an American. If you are born in France, you are a French citizen according to French law. If you are born in France to American citizens, you are both American and French. If you are born in America to French citizens, you are both French and American. It's in our consitution, and I beleive theirs. It's a simple matter of reading the Constitution and Laws of the other countries regarding citizenship. Nowhere in the Constitution does it say you have to choose one or the other, it simply says you are an American if you qualify.